As the winter cold temperature is low, just by the thermal insulation effect of insulation curtain, especially under the condition of long duration of cold weather and bad weather, it will seriously hinder the growth of greenhouse crops, and even frostbites crops, resulting in crop death or reduction. In this case, warming measures should be taken. The warming system adopts the form of water heating, with hot water as the heating source. The heat dissipation area is large, and the temperature is higher. The greenhouse temperature drops slowly and the heat dissipation is uniform, and it won’t seriously affect the crops. Hot water heating system consists of heat source (boiler), heating pipe and radiating equipment.