Locomotive signal equipment is a locomotive signal and ground signal equipment constitute of the system, complicated reasons that cause the locomotive signal don't work properly, as to overload, high speed, high density development of railway transportation, the locomotive signal is playing an increasingly important role in railway transportation. The increasing complexity of locomotive signal equipment is becoming more and more unsuitable for the traditional maintenance methods of equipment. If the equipment fails to be detected in time, the equipment should be processed as soon as possible, which will affect the normal use of the equipment. In particular, it can not only improve the reliability of the system, but also avoid the insecurity caused by the failure of equipment. This test-bed is mainly for Shanghai railway communication co., LTD., production JT1 general type locomotive signal (turkmenistan) equipment designed the machine test, incompatible with JT - C, JT1 - such as general locomotive signal host CZ2000 test. The main functions of the test bed include test and judgment of the conventional technical index of locomotive signal host, and the test function of the five-lamp signal generator, switch box and receiver coil. The test process is completely automated and can complete all tests of various indicators without manual intervention, and automatically generate test result reports. The test system of this test bed adopts the design concept of virtual instrument. The concept of virtual instrument is a software or hardware, it is completely different from the existing products, although use the computer, but is a kind of virtual instrument based on general computer hardware and operating system, realizing the function of all kinds of instruments by software design design concept. Namely, in the case of a hardware, can change the software to realize the function of different instruments and meters, eliminates the because of the traditional test system structure and function of curing system can only be changed by modifying the most of the system hardware function defects. It greatly reduces the use of hardware, reduces the research and development cycle, and improves the reliability of the system. The test system adopts advanced algorithms in signal processing and power calculation, which greatly improves the accuracy and speed of the test, and improves the quality of the test system. Because of this test rig adopts advanced design concept, techniques and algorithms, with the advanced technical level, therefore, truly represents the modern electrical measuring technology and the direction of the electric logging instrument product development, testing speed, high precision, stable work, etc.