Low-temperature process pipeline of hydrogen-oxygen engine test bed system

The invention discloses an oxyhydrogen engine test bed system low-temperature process pipeline which is in an L shape, one end of the pipeline extends to an engine along the axial direction of a thrust frame and the inner side of an automatic frame, the other end of the pipeline extends to a vacuum bin along the radial direction of the thrust frame, the pipeline between the thrust frame and the engine comprises a corrugated pipe, and the pipeline between a movable frame and a fixed frame comprises a corrugated pipe. The pipeline between the fixed frame and the vacuum bin comprises a corrugated pipe. As the corrugated pipe is adopted in the pipeline, the axial and radial compensation amounts are reserved, the corrugated pipe can deform and is convenient to install, the corrugated pipe can adapt to deformation during an engine test, and particularly, the corrugated pipe in the pipeline between the movable frame and the fixed frame generates radial displacement due to slight displacement of the engine connected