The invention discloses a coal mill heating ventilation device. The coal mill heating ventilation device comprises a coal mill top cover, an upper grinding disc, a lower pressing disc and a coal millbase disc, wherein the upper grinding disc is movably connected to the coal mill top cover, the lower pressing disc is arranged on the coal grinding machine disc, the upper grinding disc comprises anupper pressing disc, hydraulic telescopic rods connected with the upper pressing disc, a hydraulic telescopic machine and a controller, wherein the upper pressing disc is in an inverted circular truncated cone shape, and the number of the hydraulic telescopic rods is multiple; in the working process of the coal mill, the extrusion effect of the grinding disc is good, the feeding is carried out, the drying is rapid, air suction amount can be adjusted by an air suction device, the condition that the coal powder is discharged is controlled, the production requirement is met under the condition that the environment-friendly requirement is met, a heating strip and a ventilation device are used for effectively heating and drying the ink powder on the grinding disc, so that the grinding efficiency is accelerated.