Aiming at the characteristics of indoor transformer, a new handing device with combined mod and modular structure for its bell and adjuncts was designed. Hydraulic synchronous drive technology was adopted to achieve weightlifting. The lifting abutment was gatetype with scissors structure. It has the characteristics of compact composition, long stroke, avoiding tipping , fitting operation indoor, easy carrying, free adjusting and favorable construction. The handing bar has multitype heaving pile structures for different objects. PLC and hydraulic synchronous drive technology were used in the control system to meet the requirements. 