Automatic dismounting and mounting system and method for crane counterweight

The invention discloses an automatic disassembling and assembling system and method for a crane counterweight, and the system comprises a counterweight module which is detachably installed on a crane vehicle, is used for guaranteeing the stability of a crane during hoisting operation, and comprises a counterweight block and a hanging point I located on the counterweight block; and the rotary table module comprises a flat rotary table and a rear tailstock, and the flat rotary table is rotationally connected to the frame. The first positioning stop line m and the second positioning stop line n are arranged on the frame, alpha and beta are calculated according to the initial position of the central axis of the rear tailstock, accurate positioning control is carried out, the counterweight one-key automatic mounting/dismounting function is achieved through counterweight oil cylinder up-and-down limiting detection, rotation angle detection and rotary table locking pin state monitoring, and the automatic mounting/di