The invention relates to an electric vehicle battery pack anode and cathode single core large current self-locking connector, which is suitable for the transmission of electric vehicle battery pack anode and cathode large current and the electric connection of other high voltage components of an electric vehicle to electronic communication devices and industrial equipment. The electric vehicle battery pack anode and cathode single core large current self-locking connector comprises a square plate type socket and a plug. The square plate type socket comprises a square plate type socket housing, an insertion hole insulator, an insertion hole insulator covering plate, a copper bar type insertion hole assembly, a square pad and a dust prevention cover. The plug includes a connecting cap, a cap blocking ring, a marble, a marble blocking ring, a rubber ring, a plug shell, a crimp type pin insulator, a crimp type pin insulator covering plate, a crimp type pin, a housing blocking ring, a plug housing O-ring, an anti-back clamping buckle and a waterproof tail assembly.