Carbon fiber reinforced composites (CFRP) are widely used in aerospace and other fields. CFRP can realize rapid internal heating through electromagnetic induction. There are a lot of engineering applications in CFRP, such as curing, welding, deicing and so on. Firstly, the physical principle of eddy current heat is analyzed. Based on the design of carbon fiber composites with different lay numbers, the number of composite layers on the eddy current thermal effect is analyzed, and the influence of eddy current coil input power is studied according to the law of electromagnetic eddy heat generation. The electro-magnetic-thermal finite element model(FEM) is established. The electromagnetic eddy current field and temperature distribution in the induction heating process are studied by FEM Co-simulation. Finally, the results of FEM are verified by experiments. Results show: in the eddy current effect, the carbon fiber board can produce a closed-loop induced current, and the induced current is low in the middle and high around of the carbon fiber board. Under the fixed input voltage of 25V, the heating effect of single layer carbon fiber board is most significant, and the stable temperature is about 141.4 C. With the increase of input voltage, the eddy current thermal effect of double carbon fiber composite plate increases, and the thermal stabilizing time is increased synchronously. The present work provide an instruction for promoting the engineering application of eddy current heating in aviation carbon fiber composites.