The high pressure fuel pipe assembly of the diesel engine is a high pressure pipeline for the high pressure fuel pump to deliver high pressure fuel to the high pressure fuel nozzle. When the diesel engine is in operation, the high pressure fuel pipe assembly is subjected to the heavy impact load of the high pressure fuel and the additional load generated by the vibration of the diesel engine. Therefore, the high pressure fuel pipe assembly connected to the high pressure fuel pump and the high pressure fuel nozzle must have sufficient pressure resistance and the ability to lock, anti-vibrate and prevent leakage.