Direct-connection heating energy-saving system for high-rise building

The invention discloses a direct-connection heating energy-saving system for a high-rise building. The direct-connection heating energy-saving system comprises a heating pipeline and a heat preservation module. The heat supply pipeline comprises a heat supply main pipe, a high-rise heat supply pipe and a low-rise heat supply pipe, the heat supply main pipe is connected with an inlet of the high-rise heat supply pipe and an inlet of the low-rise heat supply pipe, and an outlet of the high-rise heat supply pipe is communicated with a heat supply inlet of a high-rise radiator in a building. An outlet of the low-layer heat supply pipe is communicated with a heat supply inlet of a low-layer radiator in the bottom layer of the building; the heat preservation module comprises a solar water heater, a heat discharge pipe, a heat storage coil pipe and a communicating pipe, a liquid outlet of the solar water heater is communicated with a liquid inlet of the heat discharge pipe, a liquid outlet of the heat discharge pipe