Efficient and energy-saving civil minitype boiler

The utility model discloses an efficient and energy-saving civil minitype boiler, and relates to the field of boiler equipment. The efficient and energy-saving civil minitype boiler comprises a boiler base, a waste coal removing box is arranged at the front end of the boiler base, a coal screen is arranged between the waste coal removing box and a combustion chamber, an inner boiler body and an outer boiler body are arranged on the boiler base, and a cavity is formed between the inner boiler body and the outer boiler body. The inner boiler body comprises the combustion chamber and a heat energy decomposing chamber, the back portion of the outer boiler body is connected with the inner boiler body through a chimney, a steam discharging port is formed at the upper end of the back portion of the outer boiler body, and the lower end of the back portion of the outer boiler body is connected with the inner boiler body through a dedusting port. A water outlet, a water returning port and a water adding port are formed