The invention discloses a vane pump suitable for injection molding machines, which includes a pump body, a transmission shaft is arranged in the pump body, a rotor is sleeved on the transmission shaft, a stator is arranged outside the rotor, and vane grooves are opened on the rotor. There are blades evenly distributed between the rotor and the stator, and the blades are located in the blade grooves. There are oil distribution plates on both sides of the rotor. The oil distribution plates include oil suction oil distribution plates and pressure oil distribution plates on both sides of the rotor. , The space between the stator, the vane and the oil distribution plate forms an oil cavity, and a lubricating oil hole is opened on the vane groove, and the lubricating oil hole is close to the side of the oil cavity. The invention provides a vane pump with a simple structure, which increases the continuity of the oil film on the surface of the vane, reduces the wear of the vane and the vane groove, reduces the noise, and is not easy to produce the phenomenon of biting the pump; it solves the problem of lubrication of the vane pump in the prior art The effect is not good, and the continuity of the oil film formed on the blade is not good, thereby accelerating the technical problem of the wear of the blade and the blade groove.