The invention relates to a control method capable of improving the stability during power exchange of a VSC (voltage source converter) and a weak AC network. The control method comprises a nonlinear control law of outer loop control in double closed-loop control, an integral control law for eliminating a static error increase in the nonlinear control law, and outer loop control of the double closed-loop control formed through the nonlinear control law and the integral control law. According to the control method provided by the invention, the stability of a whole system formed by the voltage source converter and the weak AC network when the power is transmitted to the weak AC network by using the voltage source converter or the weak AC network outputs the power outwards by using the voltage source converter is improved, the possibility of a potential instability failure is reduced and the utilization efficiency of the voltage source converter is improved, thereby reducing the cost.