The invention relates to a buffering closing drawer sliding rail. The buffering closing drawer sliding rail comprises a sliding rail assembly, the sliding rail assembly comprises a static rail and a moving rail, the static rail is fixed to a cabinet body, the moving rail relatively slides on the static rail, the moving rail is provided with a connecting device, and the moving rail is detachably connected with a fixing seat on a drawer through a connecting device; the connecting device comprises a fixing component and a locking component, the fixing component is fixed on the moving rail, the locking component performs restoring swinging relative to the fixing component, a spring bolt structure is arranged on the locking component, a locking hole structure which matches with the spring boltstructure is arranged on the fixing seat, and the spring bolt structure is elastically buckled with the locking hole structure. The buffering closing drawer sliding rail has the advantages of simple design, reasonable structure, convenient assembling, high assembling efficiency and reliable and stable performance.