Anti-electric-shock aluminum-plastic combined electric heater

An anti-electric-shock aluminum-plastic combined electric heater relates to the technical field of heat dissipation appliances and comprises a plurality of heat dissipation units arranged in parallel, main plastic pipes are connected to the upper ends and the lower ends of the heat dissipation units, side plastic pipes are jointly connected between the ends, facing the same direction, of the main plastic pipes, and a heating rod is arranged in one side plastic pipe. And the upper end part of the other side plastic pipe is connected with a liquid injection box. The electric heater solves the problems that in the using process of an electric heater in the prior art, due to the fact that water is introduced into the electric heater and a heat dissipation unit has conductivity, the phenomenon of damp electric shock is prone to occurring in the using process, and potential safety hazards are caused; and air flow circulation around the radiator cannot be realized for heat exchange with the radiator, the heating eff