The invention relates to a self-adjusting clutch cover assembly device. The self-adjusting clutch cover assembly device is characterized by comprising a cover (1), a diaphragm spring (2), a stopping block (3), a pressing plate (4), a pressure spring (5), a rack (6), an adjusting ring (7), a tooth-shaped block (8), a small spiral spring (9), a large spiral spring (10), a bolt (11), a limiting rivet (12), supporting rivets (13), fixing rivets (14) and a driving belt (15). The self-adjusting clutch cover assembly device can automatically compensate for the thickness abrasion of a friction plate of a driven plate of a clutch, the abrasion loss of the thickness of the friction plate can be compensated for by automatically adjusting the supporting height of the pressing plate of the clutch, and therefore the pressing force and the separating force of the clutch can keep constant in the use process.