This series of air electric heaters for ash removal and desulfurization in power plants consists of an electric heater and a control cabinet. The heating element uses 0Cr27A17Mo2 high-temperature resistance alloy wire, 1Cr18Ni9Ti stainless steel tube as the protective sleeve, and crystalline magnesium oxide filler. After compression process, it is formed and has a service life that reaches the advanced level at home and abroad. The control cabinet adopts advanced CNC temperature controllers, integrated circuit triggers, high back pressure thyristors, and other components to form a temperature measurement, regulation, and control system, ensuring the normal operation of the electric heater under the set state.