A high-efficiency multifunctional energy-saving stove, belonging to stoves, has a dust-cleaning sealed door (1), a fuel-delivery sealed door (20), a stove ring (18) on the top, a main water bag (37) around it, and an inlet The water pipe (31) and the tuyere (32), the stove body are connected with the flue gas lower flue chamber (8) and the rear flue chamber (43) below the flue gas heat utilization pot (7) through the flue gas exhaust pipe (17), and through The waste heat is connected with the front smoke chamber (41) with the fire pipe (9), and there are a water outlet pipe (12) and a chimney (40) above the flue gas utilization pot (7), and a steam valve (14) is installed on the water outlet pipe. The micro-pressure safety valve (15), the water level gauge (11) and the electric contact thermometer (16) are connected to the heat preservation water tank (10) through the U-shaped outlet water seal safety pipe (13). Fuel heating can be used for frying, boiling, and steaming various foods, and it can also provide clean and hygienic boiling water and hot water. When the stove is resting after cooking, the coil heat exchanger can be used to absorb 70~ 80% heat, more boiled water and hot water can be obtained, and the invention can ensure safe, economical and energy-saving operation.