Small-sized electric heating heater and heating system thereof

The utility model provides a small-sized electric heating heater with small volume and fast heating, which can meet the heat source requirements of a water-heated air conditioner, a radiator and a water-ground heating pipe, and a heating system thereof. The small-sized electric heating heater consists of a metal container the diameter of which is 80-150mm and the height or the length of which is 90-200mm. The small-sized electric heating heater is internally provided with 1-3 groups of 500w-1000w electrothermal tubes and is externally provided with a power plug, wherein, the electrothermal tubes are in parallel connection. The heating system consists of a small-sized electric heater, a watering tank, heating equipment and a water return control valve, or the small-sized electric heater, the watering tank, a water receiver, a circulating pump, the heating equipment and the water return control valve, wherein, the heating equipment can be the radiator, the water-ground heating pipe or the water-heated air condi