The invention discloses an intelligent anti-swinging control system for a crane and an accurate positioning method of the system. The system comprises a large trolley which is arranged on a jib and capable of moving along the jib; a small trolley perpendicular to the moving direction of the large trolley is arranged on the large trolley; a lifting mechanism is arranged on the small trolley and comprises a control reel and a lifting rope; and a lifting tool is arranged at the bottom end of the lifting rope. The system further comprises an anti-swinging controller and a monitoring input end; a guide device is arranged at the bottom of the small trolley; a rope length measuring sensor is arranged on the control reel; the guide device, the rope length measuring sensor and the monitoring input end communicate with the anti-swinging controller; and the anti-swinging controller communicates with a motor of the small trolley and a motor of the small trolley. The system has the advantages as follows: the open-loop and anti-swinging operation distance is utilized, the anti-swinging operation stability and the control precision of the crane are improved, the system is simple to realize and high in safety, and intelligence and automation of the crane are realized favorably.