The linear TDI infrared detector is widely used in many fields.Due to the influence of some factors such as work materials and manufacturing process,there are blind pixels in infrared detector.Blind pixels will cause image degradation and the distribution distortion of image gray,which affects the performance of infrared system.An alternative method of blind pixel for 576×6 linear TDI infrared detector was introduced.Based on this method,blind pixels in channels of the linear TDI infrared detector can be replaced,which improves the image quality.