The invention relates to a manual cutter grinder of a silage machine. The manual cutter grinder comprises a hobbing cutter combination, a supporting combination, a stationary cutter combination, a grinding cutter combination and a guide sliding block; the hobbing cutter combination comprises a rotary drum, hay cutters and a hobbing shaft; the supporting combination comprises upper wallboards, lower wallboards, a top sealing plate, backing plates and supporting frames; the stationary cutter combination comprises a stationary cutter seat, bracket plates and a stationary cutter; the grinding cutter combination comprises a sleeve, a grinding stone box, a grinding stone, a bearing box, a lead screw, a handle I and a handle II; the lower end of the guide sliding block is connected with a lead screw nut; and the upper end of the guide sliding block is sleeved and connected with the grinding stone box. The situation that after an operation season, a moving cutter is disassembled and then is ground is avoided, so that the labor cost is reduced; the moving cutter is sharper after being sharpened, the operation effect is improved and the labor productivity is improved; compared with a foreignautomatic cutter grinder, the cost is lower, and the manual cutter grinder is simple and easy to operate and corresponds with the situation of China; and compared with a domestic automatic cutter grinder, the performance is more stable.