In order to eliminate blind pixel of the infrared focal plan arrays and improve the image quality,this paper put forward one category of arithmetic about the threshold value and the adjacent pixels detection and adding window median repair by using IRFPA′s image data of two reference radiation source and the pertinence between the adjacent pixels.The result unfolds the excellences about the threshold value and the arithmetic of adjacent pixels detection,such as the lower misdiagnosis rate of blind pixel,the faster lookup etc.It can get obvious improve of the blind pixel picture and retain the image′s information by using the arithmetic of adding window median repair,and,this arithmetic is prone to actualize on hardware.