The utility model relates to a rotary power type multiphase booster pump, which comprises a pump body connected with a power device. A sectional pump casing is arranged outside the pump body, and the pump body comprises a plurality of units for homogenization, inhalation, pressurization and diffusion. The homogenization unit is provided with a buffer tank, and a porous separation pipe is inserted into the centre of the buffer tank; and the upper end of the separation pipe penetrates out of the buffer tank while the lower end thereof is fixed into an inhalation unit. The inhalation unit comprises a stream guide cone, on which homogenization blades are arranged. The pressurization unit comprises a cascaded structure combined by an impeller which is higher than the first level and an interstage regulator, the impeller is fixed on a pump shaft via a tapered hub outside which blades are arranged, and the impeller rotates along with the pump shaft; the interstage regulator comprises a hub sleeved on the pump shaft with clearance, a guide vane is arranged on the hub, a sleeve is fixed outside the guide vane and on the pump casing, and the interstage regulator does not rotate along with the pump shaft. Besides, the diffusion unit comprises a diffusion section and a pressing-out chamber. The utility model enables the pressurization to multiphase flow of oil gas and water to be feasible without being separated, thereby realizing the economical exploitation of marginal oil fields, nearby fields and deep-water fields.