Combined type silencer

The utility model belongs to the field of silencing equipment, and particularly relates to a combined type silencer which comprises two mounting plates and a fixing frame fixedly mounted on the backs of the mounting plates. One side of the front face of the right side mounting plate communicates with an air inlet pipe, one side of the back of the right side mounting plate is fixedly connected with four limiting rods through a sound absorption mechanism, the four limiting rods are all located in the air inlet pipe, and a fixing plate is fixedly connected between the front faces of the four limiting rods; the back of the fixing plate is rotationally connected with a lead screw through a bearing. Dust and impurities in air entering the air inlet pipe can be filtered through the filter plate, the situation that the impurities in the air directly enter the sound-absorbing cotton, consequently, gaps in the sound-absorbing cotton are blocked after long-term use, and the silencing effect is affected is avoided, the i