Portable building material lifting device

The utility model discloses a portable building material lifting device which comprises a fixed pulley, a first movable pulley and a second movable pulley, a same connecting frame is fixedly connected between the first movable pulley and the second movable pulley, a rope belt is wound among the fixed pulley, the first movable pulley and the second movable pulley, and a telescopic stabilizing assembly is arranged between the fixed pulley and the connecting frame. One side of the fixed pulley is fixedly connected with a first clamping plate through bolts, the other side of the fixed pulley is fixedly connected with a second clamping plate through bolts, and a spring plate is slidably connected between the first clamping plate and the second clamping plate. According to the portable building material lifting device, the occupied space of the device is small, the problem that resource waste is likely to be caused in the carrying process is solved, in cooperation with the labor-saving characteristic of a movable p