The invention relates to an industrial robot for carrying out insulating paper inserting operation on motor stator and working method thereof, which includes a base, a supporting device, a delta parallel mechanism, a paper inserting device and a fixing device; the base has a T-shape plate structure. The support device is arranged at the rear side end of the base, the supporting device is fixedly connected with the base, the delta parallel mechanism is arranged at the front end of the supporting device, the paper inserting device is positioned right below the delta parallel mechanism, and the number of the fixing devices is four, the fixing devices are symmetrically arranged on the upper end surface of the base, and the fixing devices are fixedly connected with the base. According to the invention, the insulating paper inserting operation can be carried out on the motor stator, the whole paper inserting process is a mechanical automatic operation, the paper inserting process is fast andconvenient, the safety is high, the consistency of the paper inserting depth is high, the investment of the labor force is reduced, the production cost of the motor is reduced, and the quality of themotor production is improved to a certain extent.