In high temperature season, watering at low temperature in the morning and evening is conducive to plant maintenance. In selecting PVC lay flat hose, long-term irrigation should pay attention to the sun-proof and ultraviolet-proof performance of PVC lay flat hose. The ordinary PVC lay flat hose has lining gum. High temperature exposure can lead to the oxidation of rubber skin inside PVC lay flat hose, and even volatilize harmful substances, causing damage to crops. So when choosing, we should pay attention to the material of high temperature resistant PVC lay flat hose, high strength polyester ribbon leather, strong toughness, which can prevent the twisting and winding of PVC lay flat hose, and is not easy to decompose at high temperature. High quality polyurethane lining PVC lay flat hose has strong wear resistance, can isolate sunshine radiation, prevent aging of water pipes and anti-ultraviolet belt, suitable for long-term outdoor irrigation.