The invention discloses a gear pump. One side, away from a hollow gear cavity, of a lower pump cover is provided with a sealing cover used for sealing a first driving shaft bearing hole and a first driven shaft bearing hole, the lower pump cover is further provided with an oil drainage groove, the oil drainage groove is arranged along a straight line formed by connecting a circle center of the first driving shaft bearing hole and a circle center of the first driven shaft bearing hole, and the oil drainage groove communicates with the first driving shaft bearing hole and the first driven shaftbearing hole. According to the gear pump, a sealing channel formed by arranging the oil drainage groove and the sealing cover, so that cooling oil in the hollow gear cavity passes through the bearingholes when the cooling oil is discharged out of the outer side of the gear pump so as to provide lubrication for the bearing holes, the problem that a lubricating liquid is not convenient to add fromthe outer side of the gear pump to the bearing holes is avoided, so that the working reliability of the gear pump is improved.