diff --git a/README.md b/README.md
index c20d244..75ca2e6 100644
--- a/README.md
+++ b/README.md
@@ -212,7 +212,6 @@ The definition is equivalent to:
 
 Tag | Type | Description
 ---|:---:|---
-collect | `string` | Determines the format of the array if type array is used. Possible values are: <ul><li>`csv` - comma separated values `foo,bar`. <li>`ssv` - space separated values `foo bar`. <li>`tsv` - tab separated values `foo\tbar`. <li>`pipes` - pipe separated values `foo\|bar`. </ul> Default value is `csv`.
 desc | `string` | Description.
 maximum | `number` | -
 minimum | `number` | -
diff --git a/README_zh-CN.md b/README_zh-CN.md
index cbd3f5e..15ff562 100644
--- a/README_zh-CN.md
+++ b/README_zh-CN.md
@@ -212,7 +212,6 @@ a.AddParamBody(&User{}, "Body", "", true)
 
 Tag | Type | Description
 ---|:---:|---
-collect | `string` | 如果类型是数组，确定其格式。可能的值有：<ul><li>`csv` - 逗号分隔的值 `foo,bar`。<li>`ssv` - 空格分隔的值 `foo bar`。<li>`tsv` - tab分隔的值 `foo\tbar`。<li>`pipes` - pipe分隔的值 `foo\|bar`。</ul>默认值是 `csv`。
 desc | `string` | 描述。
 maximum | `number` | -
 minimum | `number` | -
diff --git a/tag.go b/tag.go
index 3cd07d0..79de6a6 100644
--- a/tag.go
+++ b/tag.go
@@ -54,10 +54,6 @@ func getFieldName(f reflect.StructField, in ParamInType) string {
 func (p *Parameter) handleSwaggerTags(field reflect.StructField, name string, in ParamInType) {
 	tags := getSwaggerTags(field)
 
-	var collect string
-	if t, ok := tags["collect"]; ok && contains([]string{"csv", "ssv", "tsv", "pipes"}, t) {
-		collect = t
-	}
 	if t, ok := tags["desc"]; ok {
 		p.Description = t
 	}
@@ -111,7 +107,6 @@ func (p *Parameter) handleSwaggerTags(field reflect.StructField, name string, in
 	// Move part of tags in Parameter to Items
 	if p.Type == "array" {
 		items := p.Items.latest()
-		items.CollectionFormat = collect
 		items.Minimum = p.Minimum
 		items.Maximum = p.Maximum
 		items.MinLength = p.MinLength
@@ -124,8 +119,6 @@ func (p *Parameter) handleSwaggerTags(field reflect.StructField, name string, in
 		p.MaxLength = nil
 		p.Enum = nil
 		p.Default = nil
-	} else {
-		p.CollectionFormat = collect
 	}
 }
 
@@ -204,10 +197,6 @@ func (s *JSONSchema) handleSwaggerTags(f reflect.StructField, name string) {
 func (h *Header) handleSwaggerTags(f reflect.StructField, name string) {
 	tags := getSwaggerTags(f)
 
-	var collect string
-	if t, ok := tags["collect"]; ok && contains([]string{"csv", "ssv", "tsv", "pipes"}, t) {
-		collect = t
-	}
 	if t, ok := tags["desc"]; ok {
 		h.Description = t
 	}
@@ -255,7 +244,6 @@ func (h *Header) handleSwaggerTags(f reflect.StructField, name string) {
 	// Move part of tags in Header to Items
 	if h.Type == "array" {
 		items := h.Items.latest()
-		items.CollectionFormat = collect
 		items.Minimum = h.Minimum
 		items.Maximum = h.Maximum
 		items.MinLength = h.MinLength
@@ -268,8 +256,6 @@ func (h *Header) handleSwaggerTags(f reflect.StructField, name string) {
 		h.MaxLength = nil
 		h.Enum = nil
 		h.Default = nil
-	} else {
-		h.CollectionFormat = collect
 	}
 }
 
diff --git a/tag_test.go b/tag_test.go
index 095ea8a..1650a6f 100644
--- a/tag_test.go
+++ b/tag_test.go
@@ -55,7 +55,7 @@ func TestSchemaSwaggerTags(t *testing.T) {
 func TestParamSwaggerTags(t *testing.T) {
 	type SearchInput struct {
 		Q              string     `query:"q" swagger:"minLen(5),maxLen(8)"`
-		BrandIds       string     `query:"brandIds" swagger:"collect(csv),allowEmpty"`
+		BrandIds       string     `query:"brandIds" swagger:"allowEmpty"`
 		Sortby         [][]string `query:"sortby" swagger:"default(id),allowEmpty"`
 		Order          []int      `query:"order" swagger:"enum(0|1|n)"`
 		SkipCount      int        `query:"skipCount" swagger:"min(0),max(999)"`
@@ -68,11 +68,12 @@ func TestParamSwaggerTags(t *testing.T) {
 	assert.Len(t, o.Parameters, 6)
 	assert.Equal(t, *o.Parameters[0].MinLength, 5)
 	assert.Equal(t, *o.Parameters[0].MaxLength, 8)
-	assert.Equal(t, o.Parameters[1].CollectionFormat, "csv")
 	assert.Equal(t, o.Parameters[1].AllowEmptyValue, true)
 	assert.Equal(t, o.Parameters[2].AllowEmptyValue, true)
 	assert.Equal(t, o.Parameters[2].Items.Items.Default, "id")
+	assert.Equal(t, o.Parameters[2].Items.CollectionFormat, "multi")
 	assert.ElementsMatch(t, o.Parameters[3].Items.Enum, []int{0, 1})
+	assert.Equal(t, o.Parameters[3].CollectionFormat, "multi")
 	assert.Equal(t, *o.Parameters[4].Minimum, float64(0))
 	assert.Equal(t, *o.Parameters[4].Maximum, float64(999))
 	assert.Equal(t, o.Parameters[5].Description, "items count in one page")
@@ -82,7 +83,6 @@ func TestHeaderSwaggerTags(t *testing.T) {
 	type SearchInput struct {
 		Q              string     `json:"q" swagger:"minLen(5),maxLen(8)"`
 		Enable         bool       `json:"-"`
-		BrandIds       string     `json:"brandIds" swagger:"collect(csv)"`
 		Sortby         [][]string `json:"sortby" swagger:"default(id)"`
 		Order          []int      `json:"order" swagger:"enum(0|1|n)"`
 		SkipCount      int        `json:"skipCount" swagger:"min(0),max(999)"`
@@ -94,12 +94,13 @@ func TestHeaderSwaggerTags(t *testing.T) {
 	o := a.(*api).operation
 	c := strconv.Itoa(http.StatusOK)
 	h := o.Responses[c].Headers
-	assert.Len(t, h, 6)
+	assert.Len(t, h, 5)
 	assert.Equal(t, *h["q"].MinLength, 5)
 	assert.Equal(t, *h["q"].MaxLength, 8)
-	assert.Equal(t, h["brandIds"].CollectionFormat, "csv")
 	assert.Equal(t, h["sortby"].Items.Items.Default, "id")
+	assert.Equal(t, h["sortby"].Items.CollectionFormat, "multi")
 	assert.ElementsMatch(t, h["order"].Items.Enum, []int{0, 1})
+	assert.Equal(t, h["order"].CollectionFormat, "multi")
 	assert.Equal(t, *h["skipCount"].Minimum, float64(0))
 	assert.Equal(t, *h["skipCount"].Maximum, float64(999))
 	assert.Equal(t, h["maxResultCount"].Description, "items count in one page")