The utility model discloses a railway vehicle micro-control mid-body test bed, which integrally adopts a structure of a fixed-type test bed, and is characterized in that a host machine comprises at least four sealing devices which seals four sides of a mid-body, wherein the sealing device is provided with an air charging device, and the air charging device is connected with a pressure detection device. An object to be detected is installed on a fixed bracket to be well fixed, a programmable controller controls the air charging device to charge the air, the pressure can be maintained after the air charging, and the pressure detection device realizes the automatic pressure measurement so as to judge the air tightness, so that the complex manual installation requiring a great amount of labor force and time can be canceled; and then soapy water is manually brushed so as to observe whether air leakage exists or not. The railway vehicle micro-control mid-body test bed has simple installation and test procedure and saves time and labor force.