The invention discloses a fixation apparatus of multiple sensors. The fixation apparatus is characterized by comprising an installation frame (1), multiple support rods (2) and installation portions (3), wherein the multiple support rods (2) are arranged on the installation frame (1), the installation portions (3) are arranged on the support rods (2) for installing the sensors (100), and positions of the sensors (100) on the installation portions (3) can be adjusted. By use of the fixation apparatus of the multiple sensors, the multiple sensors can be fixed and installed in a concentrated mode, and the positions of the multiple sensors can also be flexibly adjusted. In a concrete operation process, detection requirements for different positions inside compartments of a railway vehicle can be satisfied simply by placing the fixation apparatus on the compartments of the railway vehicle. Compared to the prior art, the disadvantages of too many distribution points and one-by-one manual hand-held detection are avoided, the detection efficiency of a test is improved, and the test precision is greatly improved.