A portable fan includes a fan and a power supply drive assembly electrically connected to the fan. The power supply drive assembly includes a battery and a fan drive circuit electrically connected to the battery; the fan drive circuit includes: a master control circuit; and a three-phase drive circuit, including at least three signal input ends and three drive signal output ends. Each of the at least three signal input ends is electrically connected to the master control circuit to receive control signals; each of the three drive signal output ends is electrically connect to a respective one of three signal ends of a fan motor to respectively output the three-phase drive signal to drive the fan motor to rotate. The battery is configured to supply power to the fan drive circuit.