diff --git a/ngochess/katago/engine_analysis.go b/ngochess/katago/engine_analysis.go
index 8a891a6..02d460d 100644
--- a/ngochess/katago/engine_analysis.go
+++ b/ngochess/katago/engine_analysis.go
@@ -19,9 +19,10 @@ var ErrTimeout = errors.New("timeout")
 
 type (
 	Options struct {
-		DevMode      bool          `json:",default=false"`   // 开发模式
-		MaxMessageId uint64        `json:",default=9999999"` // 最大消息ID
-		Timeout      time.Duration `json:""`                 // 单条命令最大等待时间，默认10min
+		DevMode        bool          `json:",default=false"`   // 开发模式
+		MaxMessageId   uint64        `json:",default=9999999"` // 最大消息ID
+		Timeout        time.Duration `json:""`                 // 单条命令最大等待时间，默认10min
+		LineBufferSize int           `json:""`                 // LineBufferSize
 	}
 	Option func(options *Options)
 
@@ -63,6 +64,9 @@ func NewKatagoAnalysisEngine(opts ...Option) *AnalysisEngine {
 	if ret.Timeout == 0 {
 		ret.Timeout = DefaultTimeout
 	}
+	if ret.LineBufferSize == 0 {
+		ret.LineBufferSize = ncmd.DEFAULT_LINE_BUFFER_SIZE * 4
+	}
 
 	ret.serializer = serializer
 	ret.Cmd = ncmd.NewCmd(ncmd.WithOptions(&ncmd.Options{
@@ -70,7 +74,7 @@ func NewKatagoAnalysisEngine(opts ...Option) *AnalysisEngine {
 		Buffered:       false,
 		CombinedOutput: false,
 		Streaming:      true,
-		LineBufferSize: ncmd.DEFAULT_LINE_BUFFER_SIZE,
+		LineBufferSize: ncmd.DEFAULT_LINE_BUFFER_SIZE * 4,
 		DevMode:        ret.DevMode,
 	}))
 
diff --git a/ngochess/katago/options.go b/ngochess/katago/options.go
index dddff63..4cb3fa0 100644
--- a/ngochess/katago/options.go
+++ b/ngochess/katago/options.go
@@ -7,6 +7,7 @@ func WithOptions(opt Options) Option {
 		options.DevMode = opt.DevMode
 		options.MaxMessageId = opt.MaxMessageId
 		options.Timeout = opt.Timeout
+		options.LineBufferSize = opt.LineBufferSize
 	}
 }
 
@@ -27,3 +28,9 @@ func WithTimeout(timeout time.Duration) Option {
 		options.Timeout = timeout
 	}
 }
+
+func WithLineBufferSize(size int) Option {
+	return func(options *Options) {
+		options.LineBufferSize = size
+	}
+}