The invention provides a mechanical clutch device. The mechanical clutch device comprises a rotating shaft, a support, a track plate, a control handle, a shifting fork, a circular ring, a tooth embedding sliding sleeve, a tooth embedding cover, a chain wheel, a bearing pressing plate, a bearing A and a bearing B; the clutch device is applied to a whole machine system, the support, the track plate,the rotating shaft and the chain wheel are mounted on other parts of the whole machine system, and the rotating shaft and the chain wheel are in transmission connection with the whole machine system;when the control handle is manually pulled to move along an axial groove of the track plate, the shifting fork, the circular ring and the tooth embedding sliding sleeve are driven to axially move onthe rotating shaft, the tooth embedding sliding sleeve and the tooth embedding cover are connected in an embedded manner or separated, and power transmission between the chain wheel and the rotating shaft is executed or cut off; when the control handle is pulled to be in a vertical groove at two ends, embedding teeth are completely engaged or separated, and the clutch device is kept in a separation state or a reunion state; and when the control handle rod is pulled to move along the vertical groove to the tail end, the state of the embedding teeth is unchanged, the position of the handle rod is fixed, and the clutch device is reliably separated and engaged, until the state is changed by the next manual operation.