A variable displacement oil pump regulation mechanism comprises a transmission shaft, an outer rotor, an inner rotor, a push plate, a balance block guide plate, two groups of balance blocks, rivets, swing arms and pin shafts, wherein the outer rotor, the inner rotor, the push plate and the balance block guide plate are sequentially and serially connected by the transmission shaft, and the two groups of balance blocks are mounted on the right side of the balance block guide plate. The balance block guide plate is mounted on a guide transmission rod of the transmission shaft, the transmission guide rod drives the balance block guide plate to rotate, the balance block guide plate can axially move along the transmission shaft, the balance blocks are mounted on the balance block guide plate through the rivets and can move along the rivets in the direction far away from the center of the balance block guide plate, the swing arms are mounted on the balance blocks through pin holes and pins and mounted on the pin shafts through pin shaft holes, the pin shafts are mounted in the pin shaft holes of the transmission shaft, and the balance blocks push the transmission shaft to drive the inner rotor and the push plate to move rightwards when centrifugally moving. The variable displacement oil pump regulation mechanism is controlled to work by the aid of the centrifugal force of the balance blocks and the lever principle, the displacement of an oil pump can be changed, additional friction is less, and power consumption of an engine is low.