Assembling method and assembling lifting device for car body and chassis

Disclosed are an assembling method and an assembling lifting device for a car body and a chassis. According to the assembling method for the car body and the chassis, firstly the assembling lifting device is used for lifting the car body of a passenger car, then the car body of the passenger car is slowly put down and is connected with the chassis below in an abutting mode, and a plurality of people can simultaneously perform assembly under the assembling lifting device. Compared with a traditional method of directly welding the car body on the chassis, the assembling method for the car body and the chassis is more convenient and meanwhile can improve assembly efficiency. The assembling lifting device for the car body and the chassis comprises a base frame (2), clamping arms (1) and lifting ropes (7), the clamping arms (1) are fixed onto the edge of the base frame (2) through supporting rods (3) and can rotate around the supporting rods (3), the upper end of every clamping arm (1) is connected with a correspo