The present invention relates to a hydraulic buffer and a breaker operating mechanism using the same. The hydraulic buffer comprises an oil cylinder and a piston arranged in the oil cylinder, the piston is connected with a piston rod, and a first channel for communicating a rod chamber and a rodless chamber of the oil cylinder is arranged between the piston and the oil cylinder and/or on the piston. The piston is assembled on the piston rod along an axial slidable anti-drop device, one end of the piston rod close to the rodless chamber is equipped with a second channel, and the first end port of the second channel is located on the outer circumferential surface of the piston rod. The piston can seal the first end port via an inner wall surface when moving towards the rodless chamber along with the piston rod, and can avoid the first end port when moving towards the rod chamber along with the piston rod. The hydraulic buffer and the breaker operating mechanism using the same of the present invention solve the technical problem that the hydraulic buffer is much in parts and complicated in assembly, so that the production efficiency is low, and the product cost is high.