Solar soil heating system for automatically controlling solar greenhouse

The invention relates to a solar soil heating system, in particular to a solar soil heating system for automatically controlling a solar greenhouse. The solar soil heating system comprises a solar heater (2), a pressurization control hub (6) and a ground heating pipe (7). A pressurizing circulating pump (4), a water supply pipe (5) and a water return pipe gate valve (8) are arranged in the pressurization control hub (6), one end of the pressurizing circulating pump (4) is connected with the water supply pipe (5), and the other end of the pressurizing circulating pump (4) is connected with the solar heater (2) through a water return pipe (3). The other end of the water supply pipe (5) is connected with a tap water pipe. The lower end of the connecting junction between the pressurizing circulating pump (4) and the water supply pipe (5) is connected with one end of the ground heating pipe (7) through a water supply pipe gate valve (10). The other end of the ground heating pipe (7) is connected with the solar hea