The model and simulation of the airborne radar BIT(built-in-test) fault information display is well realized based on VC++. The fuzzy subordination method is introduced in the model of the radar fault generation. Which is attached to the relevancy of the radar generated the practical fault. Display the fault on the platform, it is based on the difference of the operation and threshold of the radar high and low priority faults. Software design the page information of the radar fault, the model has been applied in the radar simulator and approved effective.