Abstract: In this study, one echo signal simulation platform of radio detectors is constructed to obtain the echo data of the possible targets, which would be used as the test data in their design and test. Based on the MATLAB Simulink, the echo evaluation module is programmed by C++ language and the 3ds Max Model is as the scene model that could be updated according to the new positions of the possible targets, surroundings and radio detector themselves. Furthermore, the VRML display ActiveX control is also used as the dynamic display block. One space scene model is set up with 3ds MAX and used to verify the simulated echo signals which has the consistent characteristic as that with the received test data in fields.