The utility model relates to a hydraulic retarber is with export oil circuit noise -reduction -type fixing device, including being used for carrying out the installation base installed with fixing device, installation base top is connected with fixed cover, fixed cover internally mounted has the spring, spring upper portion is provided with flexible cover, flexible cover sets up fixed cover is inside, flexible cover can activity is from top to bottom carried out to fixed sheatheeing in, flexible cover upper portion is provided with the piping erection frame, install oil pipe in the piping erection frame, piping erection frame top be provided with be used for with oil pipe carries out the locking screw that fixes, the exit of piping erection frame is provided with solid fixed cone cover, gu fixed cone cover terminal surface is connected with the muffler. The beneficial effects of the utility model are that: the utility model discloses simple structure, convenient to use can play the effect of buffering to the power that the flowing of hydraulic oil process produced, also can reduce noise at work, reduces operating personnel's misoperation, improves factor of safety.