Combination type high efficiency boiler

The utility model discloses a combined type high-efficient boiler, which relates to a boiler field. Aiming at the defect of the lower thermal efficiency of present small and medium-sized boiler, the utility model provides a combined type high-efficient boiler that the cost is inexpensive, the structure of the boiler is reasonable, and the thermal current trend is prolonged in the maximum limit. The utility model consists of at least two layers of boiler drum groups composed of drum-shaped boiler drums which are mutually suited and connected, a pipeline which is mutually connected or disconnected is arranged between the boiler drum groups, and a smoke flue is arranged around the boiler drums. The utility model is suitable for producing the small and medium-sized boiler.