The invention relates to a vacuum self-sucking pump with a suction aid mechanism. The vacuum self-sucking pump comprises a pump body and a power part, wherein mainly the suction aid mechanism is disposed at an inlet channel of the pump body, and the suction aid mechanism is composed of a vacuum water diversion device, a vacuum pump and a condenser; a spindle of the vacuum pump is connected to a belt wheel fixed on a pump shaft by a belt, a first inlet of the vacuum pump communicates with the inlet channel of the pump body by the vacuum water diversion device, an outlet of the vacuum pump communicates with an inlet of the condenser, an outlet of the condenser communicates with a second inlet of the vacuum pump; an inlet of a water diversion chamber of the vacuum water diversion device communicates with the inlet channel of the pump body, and the first inlet of the vacuum pump communicates with a vacuum air vent disposed inside the vacuum chamber of the vacuum water diversion device; and oil is injected in a machine body of the condenser, an inlet of the condenser is located above the oil plane, an outlet of the condenser is located under the oil plane, and an air vent is disposed in the upper plane of the machine body of the condenser. When the pump is switched on, the suction aid mechanism starts work at the same time and suck air in the pump chamber. In this way, normal operation of the pump can be implemented and the pump operation can be kept safe; and a suction distance and efficiency can be increased.