Thermal insulation layer for plastic greenhouse

The utility model discloses a heat insulating quilt for plastic greenhouses. The utility model is characterized in that an upper surface using a high intensity infrared barrier film as a bottom layer is composited with a reinforced net middle layer formed by chinlon filaments or polypropylene filaments, and the surface of the middle layer is composited with a high foaming plastic film upper layer. The utility model has the advantages of favorable heat insulating property, long service life, light weight and easy operation and use, and the utility model can ensure the lucifugous rate of shed films and has a favorable rain and snow preventing feature and a favorable infrared outward radiation preventing feature.