The invention discloses a welding method for an intermediate frequency inverted resistance welding machine. The intermediate frequency inverted resistance welding machine comprises a main controller, a human-computer interface, an inverter module, a voltage transforming and rectifying circuit, an electric current collecting device and a voltage sensor. According to the intermediate frequency inverted resistance welding machine, the working frequency of the system is 1800 HZ, the sampling frequency and the control accuracy are improved unprecedentedly, meanwhile the welding transformer size is reduced, welding parameters are adjusted according to actual conditions of contact resistors to be performed point welding, the electric current and the time are intelligently controlled, and cold joints and the like are effectively avoided.