Transverse frame and mullion pin connection system and connection method for frame curtain wall

The invention relates to a transverse frame and mullion pin connection system and a transverse frame and mullion pin connection method for a frame curtain wall. The transverse frame and mullion pin connection system comprises a transverse frame and a mullion; the mullion is vertically connected with the transverse frame; both ends of the transverse frame are provided with sliding cavities; sliding core inserts are arranged in the sliding cavities; the sliding core inserts are fixedly connected with the mullion by double-ended pins. The invention aims to provide the transverse frame and mullion pin connection system for the frame curtain wall; manufacturing cost of the double-ended pins is lower than that of both a bolt and a spring and are simple to machine; meanwhile, the double-ended pins are solid, are difficult to damage, have long service lives and are difficult to generate the rusting condition; the sliding core inserts are integrated with sliding strips on the outer walls of the sliding cavities, are high in intensity and have long service lives, so that process steps are reduced and processing cost is low; the transverse frame and the mullion are connected by the double-ended pins, are simple to install and disassemble, construction efficiency is high and the requirement for an installer is low, so that construction cost of the integral process is greatly reduced.