To provide a plastic greenhouse type drying system capable of efficiently drying a waste multilayered sheet which is recovered, cut and cleaned by the use of solar heat.

The plastic greenhouse type drying system 1 includes a first plastic greenhouse 10 and a second plastic greenhouse 20. Sheet cut pieces w1 to be dried are put into the first plastic greenhouse 10. Air in the first plastic greenhouse 10 is agitated by a fan 18 while supplying the air on the second plastic greenhouse 20 which is heated by solar heat to the first plastic greenhouse 10 through a ventilation pipe 4, and the sheet cut pieces w1 are dried by agitation by a self-propelled agitator 30. The air containing moisture is discharged to the outside by an exhaust fan 19. By using two plastic greenhouses, the sheet cut pieces w1 are efficiently dried by the use of solar heat.