The present application provides a developer replenishment cartridge including a housing, a first rotating shaft connected to a first end portion of the housing via a sealing bearing, a wiper blade connected to a bracket beside the first rotating shaft via at least one bolt. The present application further provides a method for replenishing developer, including pressing a button inward to move the push rod forward in such a way that a front end of the push rod firstly contacts a baffle provided at an inlet of the toner cartridge for the developer in the equipment, aligning the sealing gear with the discharge port communicating with the middle of the outlet, opening the developer container, driving the wiper blade to rotate by the driving wheel of the driving unit, mixing up the developer inside the container, and feeding the developer toward the region of the second rotating shaft.