The utility model discloses a low-loss motor rotating wheel connecting structure. A fixing piece is arranged at one end of the outer surface of the transmission shaft, a locking structure is arranged at the end, close to the fixing piece, of the outer surface of the transmission shaft, and a connecting ring is arranged at the end, close to the locking structure, of the outer surface of the transmission shaft. According to the utility model, the locking structure is arranged, the rotating wheel can be fixed on the transmission shaft through the locking structure, then the rotating wheel is further fixed on the transmission shaft through the matching of the fixing piece and the limiting ring, and if the rotating wheel needs to be taken down from the transmission shaft, the locking of the rotating wheel by the locking structure can be unlocked by pressing the clamping block, so that the rotating wheel is convenient to replace; and through clamping connection between the locking structure and the rotating wheel, the situation that the rotating wheel slips during working can be avoided, abrasion of the transmission shaft is avoided, the rotor can be stably installed on the transmission shaft through the limiting structure on the transmission shaft, and deviation of the rotor during rotation is prevented.