The invention discloses a crane lifting adjusting device, which comprises a vibration reduction arm, a rotary supporting arm, a lifting adjusting arm, a lifting rope limiting bush, a mounting frame and a rotary fixing frame, wherein the rotary fixing frame is arranged on the mounting frame, a rotary shaft is arranged on the rotary fixing frame, a connecting arm is arranged in the middle of the rotary shaft, the left end of the vibration reduction arm is rotationally connected with the connecting arm, the left end of the lifting adjusting arm is rotationally connected with the vibration reduction arm, the rotary supporting arm is arranged under the vibration reduction arm, the left end of the rotary supporting arm is fixedly connected with the rotary shaft, a weight detection table is arranged between the rotary supporting arm and the vibration reduction arm, and a weight sensor is arranged between the weight detection table and the rotary supporting arm. According to the invention, the crane lifting adjusting device is novel in structural design, double protection is conducted on lifting equipment, goods are prevented from rushing to the top, safe operation of lifting work is guaranteed, operation is convenient, the working efficiency is greatly improved, the position of the lifting hook can be finely adjusted, and the practicability of the lifting device is improved.