The invention belongs to the technical field of wind power gearboxes, and discloses a planetary-stage mechanical pump structure and a wind power gearbox. The planetary-stage mechanical pump structurecomprises a toothed disc and a mechanical pump module, and the toothed disc is used for being fixedly connected with a planetary frame; and the mechanical pump module is detachably connected with a rear box body, the mechanical pump module comprises a mechanical pump pinion and a mechanical pump, and the mechanical pump pinion is in transmission connection with the toothed disc and is in transmission connection with the mechanical pump. The wind power gearbox comprises the planetary-stage mechanical pump structure. The toothed disc is fixedly arranged on the planetary frame to drive the mechanical pump pinion to rotate, thus the mechanical pump is driven to supply oil to the gearbox, and the purpose of arranging the mechanical pump in the planetary-stage structure is achieved; and the mechanical pump module adopts modular design, can be overall mounted, demounted and maintained, and operation is quite convenient.