Closed type plane phase change hot accumulating tank heating system

The invention discloses a closed type plane phase change hot accumulating tank heating system. The system comprises a hot accumulating water tank (1), a clamping plate (2), a flow-guide slot (3), a phase change hot accumulating plate (4), an insulating layer (5), a water tank heat exchanging tube (6), a water injecting tube (7), a hot water supplying tube (8), a heating supplying source (10), a drain tube (11) and a hot water heat exchanger (12), wherein valves are installed on tubes and are used for adjusting the flow, and the hot water supplying tube is connected to the hot accumulating tank in a closing or opening mode. When the heating supplying source heats the hot accumulating water tank through the water tank heat exchanging tube, the surplus heat can be stored in a phase change hot accumulating material. When the heating supplying source stops running or the water of the hot accumulating water tank fails to reach the heating temperature through the heating, the phase change hot accumulating plate can