Assembly method for rapidly forming press machine frame and obtained press machine frame

The invention discloses an assembling method for a rapid forming press machine frame and the obtained press machine frame. A first side plate assembling part and a second side plate assembling part are separately welded; the upper cross beam and the bottom workbench are assembled and then folded to form a cross beam workbench assembly part, two persons can weld the cross beam workbench assembly part at the same time, and overturning is conducted four times in the welding process. After welding is finished, the assembly part is split into an upper cross beam assembly part and a bottom workbench assembly part which are independent; the first side plate assembly part is vertically fixed to the assembly platform, the first side plate assembly part serves as a zero reference, the heights of the upper cross beam assembly part and the bottom workbench assembly part are positioned through equal-height blocks, and the upper cross beam assembly part and the bottom workbench assembly part are moved to set positions from