The invention discloses powder spraying equipment for coating, and relates to the field of workpiece coating, in particular to powder spraying equipment for coating. The powder spraying equipment forcoating is provided and is simple in structure, facilitates filtration and adsorption and improves the quality of the working environment. The powder spraying equipment comprises a pair of supports, acompartment body, a main water tank and a pair of subsidiary water tanks, wherein the compartment body is arranged on the pair of supports, the main water tank is arranged at the bottom of the compartment body and located between the pair of supports, the pair of subsidiary water tanks are arranged at the top of the compartment body separately, and the main water tank is connected with the pair of subsidiary water tanks separately through a water pump. The bottom of the main water tank is conical, and a water outlet is formed in the center of the bottom of the main water tank. The powder spraying equipment facilitates processing and is reliable in operation.