The invention provides a floating synchronous curl-up film roller type seedling plastic film collector which is characterized by comprising a stand. The middle part of the stand is rotatably connected with a land axle, two land wheels are respectively fixed at both ends of the land axle, a soil shaking mechanism is rotatably connected to the stand arranged above the land axle, a gripper-shaped film loosening mechanism is fixed on the stand arranged behind the soil shaking mechanism, two adjustable break shovels are respectively arranged at both sides of the front end of the stand, two U-shaped brackets are respectively fixed at both sides of the back end of the stand, a curl-up film roller is supported in the two U-shaped bracket through a curl-up film roller axle, a tension spring is respectively connected between each end of the curl-up film roller axle at the outer side of the two U-shaped brackets and the stand, a wheel cylinder which is driven by the curl-up film roller through friction is arranged below the curl-up film roller, extension ends at both ends of the wheel cylinder are rotatably connected to the stand, the extension end at one end is connected with a side land axle through a wheel cylinder transmission mechanism, and the extension end at the other end is connected with the soil shaking mechanism through a soil shaking transmission mechanism. The film curling speed of the invention is consistent with the advancing speed of a machine, thereby efficiently avoiding the phenomena of film tearing and breaking and ensuring normal continuous work of the machine.