The utility model discloses a folding collection device for plastic films. The folding collection device for plastic films comprises a rack, wherein a pair of primary traction clamping rollers and a first motor are arranged on the rack; a swinging bracket is arranged below the primary traction clamping rollers; a swinging shaft is arranged at the upper part of the swinging bracket; the central axis of the swinging shaft is parallel to the axial direction of the primary traction clamping rollers; the swinging shaft of the swinging bracket is formed by a left section and a right section on a same straight line; a secondary traction clamping roller and a second motor are arranged at the lower part of the swinging bracket; two guide rollers are fixedly arranged on the rack; watching from the up-down direction, the two guide rollers and the swinging shaft are located at a same height; watching from the front-back direction, the two guide rollers are respectively located at the front and rear sides of the central axis of the swinging shaft of the swinging bracket; and watching from the left-right direction, the two guide rollers are located between the left and right sections of the swinging shaft in parallel. According to the folding collection device for plastic films, in the folding and swinging process of a film, the tensile force of the film between the primary and second traction clamping rollers does not change, so that the reliable cutting action of a cutter is ensured and the structure is simple.