Electrostatic powder spray gun with two degrees of freedom

The invention discloses an electrostatic powder spray gun with two degrees of freedom. The electrostatic powder spray gun comprises a two-degree-of-freedom automatic rotating mechanism and a spray gun main body, the two-degree-of-freedom automatic rotating mechanism can be divided into a base, a second rotating body and a first rotating body. And the second rotating body is controlled by a motor positioned in the base and can freely rotate on a horizontal plane. The first rotating body is controlled by a motor located in the second rotating body and can freely rotate on the vertical plane. The stepping motor can accurately control the rotation angle. Correspondingly, the invention provides a design of a double-elbow powder conveying pipeline with a built-in rectifier so as to be matched with double-degree-of-freedom rotation, and meanwhile, uniform distribution of flow velocity at an outlet is ensured. According to the spray gun, the uniformity of powder coating covering on the surface of a workpiece with a c