CNC (computer numerical control) inner-cooling efficient drilling tool

The utility model discloses a CNC numerical control inner-cooling efficient drilling tool which comprises a tool handle, a tool body is fixedly connected to the bottom of the tool handle, a cutting structure is arranged on the surface of the tool body, a through hole is formed in the bottom of the tool body, a guide structure is arranged in the through hole, a cooling structure is arranged on the surface of the tool body, and the cooling structure is arranged on the surface of the tool body. The cooling structure comprises a cooling ring arranged on the surface of the cutter handle in a sleeving mode. According to the utility model, the production efficiency is high, the feeding speed of 0.15-0.4 mm/r can be realized, the precision of the rigid numerical control equipment can reach IT10 level conventionally, the precision of the rigid numerical control equipment can reach IT9 level when the condition is better, the drilling roughness can reach Ra6.3-3.2, the self-centering function is realized, the labor cost