diff --git a/client/tendermint/tx/searchtx.go b/client/tendermint/tx/searchtx.go
index 36b8450de..2305b9292 100644
--- a/client/tendermint/tx/searchtx.go
+++ b/client/tendermint/tx/searchtx.go
@@ -3,19 +3,19 @@ package tx
 import (
 	"errors"
 	"fmt"
+	"net/http"
+	"net/url"
 	"strings"
 
-	"github.com/spf13/cobra"
-	"github.com/spf13/viper"
-
 	"github.com/irisnet/irishub/client"
 	"github.com/irisnet/irishub/client/context"
 	"github.com/irisnet/irishub/client/utils"
 	"github.com/irisnet/irishub/codec"
 	sdk "github.com/irisnet/irishub/types"
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
 	ctypes "github.com/tendermint/tendermint/rpc/core/types"
-	"net/http"
-	"net/url"
+	"github.com/tendermint/tendermint/types"
 )
 
 const (
@@ -60,7 +60,11 @@ $ iriscli tendermint txs --tags '<tag1>:<value1>&<tag2>:<value2>'
 					return fmt.Errorf("%s should only contain one <key>:<value> pair", tagsStr)
 				}
 				keyValue := strings.Split(tag, ":")
-				tag = fmt.Sprintf("%s='%s'", keyValue[0], keyValue[1])
+				if keyValue[0] == types.TxHeightKey {
+					tag = fmt.Sprintf("%s=%s", keyValue[0], keyValue[1])
+				} else {
+					tag = fmt.Sprintf("%s='%s'", keyValue[0], keyValue[1])
+				}
 				tmTags = append(tmTags, tag)
 			}
 
@@ -168,9 +172,11 @@ func SearchTxRequestHandlerFn(cliCtx context.CLIContext, cdc *codec.Codec) http.
 				utils.WriteErrorResponse(w, http.StatusBadRequest, sdk.AppendMsgToErr("could not decode query value", err.Error()))
 				return
 			}
-
-			tag := fmt.Sprintf("%s='%s'", key, value)
-			tags = append(tags, tag)
+			if key == types.TxHeightKey {
+				tags = append(tags, fmt.Sprintf("%s=%s", key, value))
+			} else {
+				tags = append(tags, fmt.Sprintf("%s='%s'", key, value))
+			}
 		}
 		pageString := r.FormValue("search_request_page")
 		sizeString := r.FormValue("search_request_size")