The present invention discloses a pressure sieve rotor capable of increasing flow rate. It includes a cylindrical pressure sieve rotor self-body, on the pressure sieve rotor self-body several rotor blades are fixedly mounted, on the peripheral surface of the rotor self-body between the described rotor blades several pulp-passing holes which are communicated with internal cavity of rotor self-body are set, and the upper end surface and lower end surface of the described rotor self-body are equipped with the through holes which are respectively communicated with internal cavity and external cavity of said rotor self-body, and the internal cavity and external cavity of said rotor are completely identical. Besides, said invention also provides the working principle of said pressure sieve rotor and its operation method. |