Disclosed is a four-pin AC parallel connector and a male and a female thereof. The male is composed of a male body, a four-pin male conductor, a retainer, an inner housing, a sleeve, an outer housing and an AC four-pin lead; and the female is composed of a female body, an inner housing, a sleeve, an outer housing, an AC four-pin lead and a four-pin female conductor. The four-pin AC parallel connector and the male and the female thereof of the invention is simple in mounting and dismounting operations, small in volumes and good in sealing property, the working stability is improved, and the service lives are prolonged.