Bag type dust collector capable of preventing bag pasting

The utility model relates to a bag type dust collector capable of preventing a bag from being burnt. Upper box body, one end of the upper box body is fixedly connected with a middle box body; one endof the middle box body is fixedly connected with an ash bucket; the ash bucket is communicated with the middle box body; an ash discharge valve is arranged at one end, far away from the middle box body, of the ash hopper; an air inlet is formed in one side of the middle box body; an air outlet is formed in one side of the upper box body; an upper top plate is fixedly arranged at the end, away fromthe ash bucket, of the middle box. A mounting hole is formed in the upper top plate; a filter bag frame is arranged in the mounting hole; a filter bag is arranged on the filter bag frame in a sleeving mode, an annular convex edge is fixedly arranged at one end of the filter bag frame, the annular convex edge of the filter bag frame abuts against the surface of the upper top plate, a containing frame is fixedly arranged be