Micro nano hydrophobic surfaces with large contact angle and low surface energy were studied to reduce air collision caused by icing. In this paper, a microstructure was successfully constructed on the surface of TC4 using ananosecond pulse laser, and the surface morphology and elemental composition of TC4 were observed by scanning electroscopes and EDS, the surface wettability and surface energy were analyzed by using the contact angle measuring instrument, and a low-temperature ice frost test bench was built to test the performance of ice-suppressing frost of the surface . With the increase of laser power, the size of micron particles on the surface of TC4 alloy increased. The contact angle decreases gradually with the increase of power, and is higher than the unprocessed surface. Surface free energy increases gradually with the increase of power, and is lower than untreated surface; The adhesion work increases gradually with the increase of power, and is smaller than the untreated surface; The freezing time of the surface droplets after processing is 47 s, later than that of the unprocessed surface; The laser power 7 W has the longest freezing time, the lowest frost crystal quality and the lowest surface coverage.The microtexture surface with high contact angle and low contact angle lag can effectively delay the freezing time.