Hardware electrostatic powder spraying pretreatment device

The utility model discloses a hardware electrostatic powder spraying pretreatment device which comprises a catenary transmission line and a closed working shed, and the catenary transmission line is fixedly installed on the inner top of the closed working shed. Spraying mechanisms are installed on the degreasing section, the primary washing section, the secondary washing section, the surface adjusting section, the phosphorization section, the third washing section and the fourth washing section, water baffles are fixedly connected to the bottoms of transition channels of the closed working shed, air curtain machines are installed on the upper portions of the two ends of the closed working shed, and sealing structures are fixedly connected to the lower ends of inclined plates. A suspender installed on the lower portion of the catenary transmission line penetrates through the sealing structure. The sealing structure is installed on the top of the closed working shed, the top and the lower portion of the closed