Based on the test for anti-evade attack of IDS(Intrution Detection Systems), traditional software testing method was improved, and a simple and effective software method was designed. This improved method use VMware virtual maching, test software were running on physical and virtual machine, the network cards of the virtual maching were set in different operation mode to build the test environment, simplifying the testing method, saving the testing equipment and the test result is correct and effective. Meanwhile, compared with the instrumentation BPS(Breakingpoint Systems) expensive instrumentation isn't required.