PET composite board is made of PET as base material and fiber cloth as skeleton. It is more environmentally friendly, durable and has higher light transmittance than FRP board, and lower cost than PC board. While ensuring the high light transmittance of PET board, it avoids the defect of high temperature deformation. The light transmittance can reach 83%, and the high temperature resistance can reach 120 degrees Celsius. It can be used outdoors for more than 10 years.