NOVELTY - Multi-functional biomass conversion burn resistant hot water heater comprises burn resistant hot water heater (1) and water storage buffer tank (10). The burn resistant hot water heater is equipped with vertical hopper (2). The upper part of hopper is equipped with hopper cover (201) and lower part is equipped with pyrolysis chamber (202). A burn resistant hot water heater grate is located between pyrolysis chamber and combustion chamber located at bottom of burn resistant hot water heater. A heat exchange chamber is located between inner wall of hopper and burn resistant hot water heater.    USE - The water heater is useful for cooking, bathing and heating.    ADVANTAGE - The water heaters in combination with biomass waste resources utilization system and heating system is suitable for converting the agricultural waste into biogas.    DETAILED DESCRIPTION - Multi-functional biomass conversion burn resistant hot water heater comprises a burn resistant hot water heater (1) and a water storage buffer tank (10). The burn resistant hot water heater is equipped with a vertical hopper (2). The upper part of the hopper is equipped with a hopper cover (201) and the lower part is equipped with a pyrolysis chamber (202). A burn resistant hot water heater grate is located between the pyrolysis chamber and a combustion chamber located at the bottom of the burn resistant hot water heater. A heat exchange chamber is located between the inner wall of the hopper and the burn resistant hot water heater. The side wall of the heat exchange chamber is equipped with a water inlet and a water outlet. The water outlet is connected to a circulating water inlet of the water storage buffer tank via a pipeline pump. The recycled water outlet of the water storage buffer tank is connected to the inlet of the heat exchange chamber. The water storage buffer tank is equipped with a hot water outlet. The upper part of the heat exchange chamber is equipped with an airflow buffer chamber. The bottom end of the heat exchange chamber and the combustion chamber are equipped with an air inlet channel. The pyrolysis chamber distributed with chamber wall is connected to pores of the air inlet channel. The burn resistant hot water located between the heater heat exchange chamber and the combustion chamber is equipped with an air inlet and a carbon discharge port. The air inlet is connected to the air inlet channel. The carbon discharge port is connected to the pyrolysis chamber via a guide tube. The heat exchange chamber is equipped with a heat exchange pipe. The heat exchange pipe at one end is connected to the airflow buffer chamber and the other end is connected to the combustion chamber via the air inlet channel. The upper part of the airflow buffer chamber is equipped with a chimney.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the multi-functional biomass conversion burn resistant hot water heater.    Burn resistant hot water heater (1)    Hopper (2)    Water storage buffer tank (10)    Hopper cover (201)    Pyrolysis chamber (202)