The cold shield is an important part of the infrared detector assembly,and it will be cooled with the detector.Aiming at F2 cold shield for the 320×256,30 μm scale infrared detector,through cooling experiment with different technical conditions of cold shield in the same cold platform,the influence of the corresponding technical conditions of cold shield on the cooling process was studied,and the corresponding results were obtained under different technical conditions of cold shield.The results provide a reference for optimizing the thermal design of cold shield.