Over-current protection circuit of winding switching motor, control method and winding switching motor

The invention relates to an overcurrent protection circuit of a winding switching motor, a control method and the winding switching motor. The overcurrent protection circuit comprises an operational amplifier circuit used for receiving a sampling voltage and a first reference voltage, and amplifying the sampling voltage based on the first reference voltage to generate an output voltage; the comparison circuit is connected with the operational amplification circuit and is used for comparing the output voltage with a second reference voltage and outputting a comparison result; and the motor driving chip is at least connected with the comparison circuit, and is used for determining and outputting a target reference voltage according to the winding connection state of the winding switching motor, and determining whether to trigger an overcurrent protection function or not according to the comparison result. According to the overcurrent protection circuit, the overcurrent protection requirement of the winding swit