The invention provides a cylinder sleeve dismounting device. The cylinder sleeve dismounting device comprises pressing devices, friction plates, a base, regulating liner tubes, a pressing nut, a supporting block, a wear reducing device, a rocking bar and a center stud, wherein the center stud is used for sequentially mounting the base, a plurality of pressing device, the pressing nut, the supporting block and the rocking bar from bottom to top; the rocking bar and the pressing nut are both in threaded connection with the center stud; each regulating liner tube is arranged between every two adjacent pressing devices; a cylindrical structure consisting of a plurality of friction plates of which the sections are arc-shaped is arranged at the outer side of each pressing device; the bottom of each friction plate is in contact with the base. The device disclosed by the invention can be used for realizing dismounting of a general cylinder sleeve and also realizing the dismounting of the cylinder sleeve at a condition that the width of a large head of a connecting rod is larger than the inner diameter of the cylinder sleeve; the cylinder sleeve dismounting device is reasonable in structural design and easy to implement.