The invention discloses an energy saving technology of a mobile communication base station. A machine room is built on a transmitting tower base in a suspending manner; in a frame structure, a wall body is a hollow heat-insulating interlayer; solar energy is utilized as energy for fan used for indoor and outdoor air exchange, illumination, a cooling liquid circulating pump and non-communication power utilization; in the energy saving technology, standardization and generalization are realized, the construction is convenient and fast, the pollution is low, industrial production can be achieved, fire resistance, heat insulation and seismic resistance are achieved, temperature difference between day and night is adopted to cool liquid used for reducing the temperature, communication transmitting equipment is provided with a special radiating device, and a device for storing cooling liquid is arranged; and the energy saving technology can be widely applied in construction and operation of the mobile communication base station, thus saving energy, reducing emission and saving land.