The invention relates to a drinking machine with bidirectional electric heater. Wherein, it adds one electric heater (6) at the electric heating element (5) inside the container (3) of drinking machine (2), and adds one switch (7) at the body of drinking machine (2); the electric heater (6) is 300-3000w; the upper part of drinking machine is mounted with water barrel (1); when the hot water switch (4) is used commonly, the electric heating element (5) only heats for little people, when there are many people, the consumption is increased, the electric heater switch (7) can be opened to connect added electric heater (6), therefore, they are heating together, to increase the energy and shorten the heating time; when the hot water switch (4) is turned on, the consumption is increased, and the heating time can be reduced, to reduce pollution. |