Static-pressure labyrinth gear box of planet ball mill

The invention relates to the technical field of ball mill transmission, and in particular, discloses a static-pressure labyrinth gear box of a planet ball mill. The static-pressure labyrinth gear boxof the planet ball mill comprises an oil box cover, an oil box, a transmission gear, a main transmission shaft and a milling tank shaft; the main transmission shaft is inserted in the center of the oil box; the milling tank shaft is inserted in the oil box cover and positioned around the main transmission shaft; the main transmission shaft is in transmission connection with the milling tank shaftthrough the transmission gear; the oil box cover is connected with a bearing base of the main transmission shaft through screws; the side wall of the oil box vertically extends up to form a first baffle plate; the side wall of the oil box inwards extends to form a third baffle plate; the third baffle plate is provided with a second baffle plate slightly lower than the first baffle plate; the firstbaffle plate, the second baffle plate and the third baffle plate form a first groove; the oil box cover is provided with a second groove oppositely staggered with the first groove; and the upper endof the second baffle plate is positioned in the second groove. The static-pressure labyrinth gear box of the planet ball mill is simple in structure, can effectively reduce the leakage consumption ofoil, prolongs the total maintenance period, is not influenced by machining errors, and needs no parts easily aged such as a sealing ring.