The heliogreenhouse irrigation system is composed of heliogreenhouse and solar collector, in which the rear wall of the heliogreenhouse is semi-underground heat-insulating wall and is connected with arched beams at 38-48 deg. of elevation angle, and the ratio of its daylighting area to the span of heliogreenhouse is 1 : 1.0-1.2. The solar collector is placed on the rear wall of the heliogreenhouse, and the collector tube is connected with irrigation facilities being in the heliogreenhouse. By selecting the daylighting angle and position of solar collector said invention solves the problem of reasonably using solar energy to raise the temp. of water and use warm water to irrigate the field.