The invention discloses a separator for separating grass and trees from plastic films. The separator comprises a case, a screen drum, a spindle and a dust suction device, wherein the screen drum is axially and horizontally fixed in the case, a feed inlet is arranged at one end of the screen drum, a
discharge outlet is arranged at the other end of the screen drum, the spindle is installed at the center of the screen drum in a rotating mode and driven by a spindle power device, the spindle is provided with a pushing screw blade section, a centrifugal scattering screw blade section and a discharging blade section, the pushing screw blade section and the discharging blade section correspond to the feed inlet and the
discharge outlet respectively, the centrifugal scattering screw blade section is positioned between the pushing screw blade section and the discharging blade section, the dust suction device is communicated with the inner cavity of the case, an
impurity collecting cavity is disposed at the bottom of the case, and an
impurity discharge port is formed in the wall of the
impurity collecting cavity. The separator can separate impurities in films, such as grass, trees and dust automatically and continuously, so that the separating efficiency of the impurities in agricultural film
recovery is improved, and requirements for agricultural film
recovery production lines are met.