The invention provides a winding and side shearing device. The winding and side shearing device comprises a rack, auxiliary carrier roller components, auxiliary hold-down mechanisms, a side shearing mechanism, a winding cut-off mechanism, a film winding mechanism and a scrap side winding device, wherein an unwinding roller component and a first guide roller component are arranged on the rack; the winding cut-off mechanism is arranged above the auxiliary carrier roller components; the side shearing mechanism is arranged at one side of the winding cut-off mechanism; a side shearing knife component is arranged on the side shearing mechanism; side shearing knives are symmetrically mounted on the side shearing knife component; the auxiliary hold-down mechanisms are arranged at two sides of the winding cut-off mechanism and work together with the auxiliary carrier roller components; and the auxiliary carrier roller components work together with the film winding mechanism through a spreading roller component and work together with the scrap side winding device through a second guide roller component. As side shearing is performed after a film is compressed by the auxiliary hold-down mechanisms, smooth side shearing can be guaranteed, waste of the film is reduced, the film is automatically cut off after finish of winding, and a sheared opening is regular.