Movable screen frame for tensioning SMT (Surface Mount Technology) template steel sheet

The utility model discloses a movable screen frame for tensioning an SMT template steel sheet, which comprises an outer frame, the inner walls of the four edges of the outer frame are provided with mounting grooves, the SMT template steel sheet is arranged in the outer frame, the top ends of the four mounting grooves are rotatably provided with connecting rods, the extending ends of the four connecting rods are connected with turntables, the other ends of the four connecting rods are connected with lead screws, and the lead screws are connected with the connecting rods. The four lead screws are all in threaded connection with screw sleeves, the extending ends of the screw sleeves are connected with supporting plates, the extending ends of the supporting plates are all provided with grooves, springs are arranged between the two sides of the supporting plates and the inner walls of the corresponding installation grooves, and the four supporting plates are all provided with spring buckles. The four clamping edge