Surface treatment process for handle connecting cross rod

The invention relates to the field of metal products, and particularly discloses a surface treatment process of a handle connecting cross rod. The surface treatment process comprises the following operations of soaking a finish-machined metal part in a solution tank A, carrying out drying in a tunnel furnace after soaking, and spraying an electrostatic powder coating on the surface of the metal part by using an electrostatic spray gun after drying; wherein the solution raw materials in the solution tank A comprise the following components in parts by weight: 10-15 parts of surfactant, 15-20 parts of photocatalyst solution, 120-150 parts of water; and when the metal part is soaked in the solution tank A, ultrasonic oscillation is performed on the solution tank A, and ultraviolet lamp irradiation is performed on the solution in the solution tank A. The process can solve the problem of concave holes of the powder coating, reduce the baking cost and solve the problem of bacterium breeding of a finished product. 本