For the icing phenomenon in the bogie area of high-speed train in winter,the anti-icing coating is prepared to slow down the phenomenon. In this paper,the micro-nano structure coating is prepared by supersonic flame spraying WC-Co powder,and different low surface energy materials are modified on its surface to study the influence of low surface energy modification on the static contact angle of coating. The results show that adopting hydrophobic fumed nano silica treated with different concentrations and procedure parameters,the contact angle can be increased. The optimum low surface energy modification procedure is as following:the concentration of Si O2 acetone solution is 20 mg/m L,spraying distance is250 ～300 mm,spraying angle is 75° ～80°,spray gun moving speed is 60 mm/s,spraying passes are 5 times,and compressed air pressure is 0.65 MPa. And the contact angle of 154.3° ±3.0° and rolling angle of 4.1° ±0.1° can be obtained by this procedure.