PDC drill bit for geothermal well

The invention discloses a PDC drill bit for a geothermal well. The PDC drill bit comprises a drill bit body, cutting teeth, a nozzle and blades, wherein the blades are arranged on the drill bit body,and the cutting teeth are fixed on the blades. At least one blade is provided with at least one blade inner flow channel penetrating through the blade in the thickness direction. Due to the existenceof the blade inner flow channels, the flowing performance of drilling fluid around the drill bit can be improved to the maximum extent, the heat dissipation capacity of the blades and the cutting teeth is improved, and the drill bit is kept to work in an environment with the temperature lower than the surrounding stratum temperature. Meanwhile, the area of a mud drum bed required by attaching rockdebris to a front blade surface is reduced, the possibility that the rock debris is accumulated on the blade surface is greatly reduced, and therefore the purpose of reducing the risk of causing bitmud drums is achieved. 本发明公开