Automatic paint spraying chamber for large bridge steel member

The utility model discloses an automatic spray booth for large bridge steel members, which comprises a booth seat, two side plates and a booth cover, the bottom ends of the two side plates are fixedly connected with the two sides of the top end of the booth seat respectively, the bottom end of the booth cover is fixedly connected with the top ends of the two side plates, a support frame is fixedly mounted on one side of one side plate, and the support frame is fixedly mounted on the other side of the other side plate. A lead screw is rotationally installed in the supporting frame, one end of the lead screw is sleeved with a moving block, an extending block is arranged at the bottom end of the moving block, an L-shaped plate is arranged on one side of the extending block, the lead screw, the L-shaped plate, a cylinder, a covering film, a clamping strip, an auxiliary plate and a pointed cone are arranged, the lead screw is rotated, the moving block is driven to move front and back at one end of the moving block