Abstract: The leakage phenomenon of rubber tubing in a military equipment was analyzed by means of macroscopic observation, mechanical property test, scanning electron microscope and energy spectrum analysis, infrared spectrum analysis. The results show that the rubber tubing did not have the characteristics of bursting from inside to outside, and there was no aging phenomenon. The mechanical damage of foreign hard objects caused the tubing to break from the outside to the inside, which eventually led to the leakage of the tubing.