The invention discloses a tinplate clamping and lifting mechanism, and belongs to the field of tin-making machining mechanical equipment. The tinplate clamping and lifting mechanism comprises a fixed support, lifting screw rods, a lifting support, fixed material-clamping plates and a material-clamping motor. The lifting screw rods are vertically and rotatably connected with the two sides of the fixed support correspondingly, the lifting screw rods are in threaded connection with lifting sleeves, and the fixed material-clamping plates are vertically arranged on the two sides of the lifting support correspondingly; material-clamping gears are vertically and rotatably connected with the two sides of the middle of the lifting support correspondingly, the middles of upper material-clamping plates and the middles of lower material-clamping plates are hinged to material-clamping supports correspondingly, and upper connecting rods are arranged between the upper material-clamping plates and material-clamping driving plates; and lower connecting rods are arranged between the lower material-clamping plates and the material-clamping driving plates, and the material-clamping motor drives an output gear. According to the tinplate clamping and lifting mechanism, the structural design is reasonable, tinplate can be rapidly, efficiently and firmly clamped and smoothly lifted according to machining needs, and the needs for production and use are met.