In order to simulated the functions of the icing probe,a mathematical model of the icing probe of one UAV,based on mechanism modeling method,was built using Simulink,.The model contained icing,heating,probe and icing rote To prove the correctness of the mathematical model,a simulation platform was setted up with RTW and VxWorks.Then the real-time simulation was started on the simulation platform and verified the correctness of the mathematical model through the data displayed on the LabVIEW interlaces.It has certain reference value for modeling and simulation for similar systems as well as analysis of real-time control software performance.