The invention discloses an annular inner-scraping type discharging unit which comprises a buffering section (1) and a discharging section (2) which are arranged at the bottom of a mixing barrel (6) of a stirring machine from top to bottom. The side wall of the discharging section (2) is sequentially provided with multiple penetrating grooves from top to bottom, the exterior of the discharging section (2) is sleeved with a vibration sleeve (3), the inner wall of the vibration sleeve (3) is sequentially provided with multiple anti-binding strips (4) from top to bottom, the anti-binding strips (4) penetrate through the penetrating grooves, the top of the vibration sleeve (3) is connected with a spring (5), the top of the spring (5) is installed in an annular groove through a fixing part, and the annular groove is formed in the outer wall of the buffering section (1); the anti-binding strips (4) are tilted to the side wall of the discharging section (2) from the top to the bottom. The annular inner-scraping type discharging unit can effectively prevent blocking of materials.