Sleeve and roof bolter

The utility model provides a sleeve and a roof bolter, and the sleeve comprises a sleeve body which comprises an input end and an output end; the at least one through hole is formed in the side wall of the cylinder body, and the at least one through hole is located in the corresponding side wall, close to the input end, of the output end. The sleeve comprises a sleeve body and at least one through hole formed in the side wall of the sleeve body. Wherein the barrel comprises an input end and an output end, the input end is used for being connected with a driving device, and the output end is used for being connected with a driven part. Furthermore, the forming position of at least one through hole is close to the side wall corresponding to the side, connected with the input end, of the output end, so that impurities in the portion, corresponding to the input end, of the cylinder body can be better cleaned, and the situation that the impurities in the cylinder body affect the stability of overall operation is a