The invention discloses a tea grinding device. The tea grinding device comprises a baseplate device, a grinding structure, a heating device, a connecting device, a filter device, a feeding device and a crushing device; the baseplate device includes a baseplate, a first support rod, a first bracket and a second support rod; the grinding structure includes a first roller, a first moving plate, a first saw tooth, a counterweight block, a first positioning rod, a third support rod, a first fixed frame, a first spring and a support plate; the heating device includes a heating frame, a cooling frame, a first cross bar and a heating rod; the connecting device includes a connecting pipe, a second bracket, a first baffle plate, a second vertical rod, a holding rod, a second cross bar, a first limiting block, a third vertical rod, a third bracket and a second roller; the filter device includes an inclined plate, a fourth support rod, a first inclined rod, a third cross bar, a second baffle plate and a filter screen; and the feeding device includes a feeding hopper, a feeding pipe, a crushing frame, a third roller, a first crushing tooth, a discharge pipe, a fourth roller, a fourth bracket and a fourth cross bar. The tea grinding device is excellent in grinding effect and high in efficiency.