Large plate hoisting device for tower crane

The utility model relates to a large plate hoisting device for a tower crane. The large plate hoisting device comprises a hoisting mechanism at the upper part and a clamping mechanism connected with the hoisting mechanism, the clamping mechanism comprises an upper fixed plate (17) connected with the hoisting mechanism, two groups of movable plates (20) which are arranged in a sliding manner are arranged on the upper fixed plate (17), a middle plate (24) is rotationally connected to the center of the upper fixed plate (17), the two ends of the middle plate (24) are movably connected to the centers of the movable plates (20) through connecting arms (23) respectively, and an oil cylinder (21) for driving the movable plates is further arranged on the upper fixed plate (17); clamping blocks (26) are connected to the lower portions of the two ends of the movable plate (20), and each clamping block (26) comprises a clamping wheel (2602). The device can clamp a wood board, the wood board is kept in the horizontal dir