Near-bit axial hydraulic vibration impactor

The near-bit axial hydraulic vibration impactor comprises a machining cover, the machining cover is provided with a containing opening, the side, located on the containing opening, of the machining cover is connected with a protective door in a sliding mode, a fixing mechanism is installed in the machining cover, and the fixing mechanism comprises a plurality of first electric guide rails, a fixing column and a fixing ring. The first electric guide rail is slidably connected with a fixing plate, one side of the fixing plate is connected with a fixing column, one end of the fixing column is connected with a fixing ring, micro electric push rods distributed at equal intervals are installed in the fixing ring, and a machining assembly is installed on the first electric guide rail through a moving block. The protective door arranged on the machining cover can prevent chippings from splashing and hurting workers during machining, the fixing mechanism arranged in the machining cover can fix machined materials, mean