Dust collector with efficient air outlet filtering assembly

The dust collector comprises a machine shell, a groove is formed in the top end of the machine shell, a top shell is installed in the groove, a supporting plate is fixedly arranged in the machine shell and divides the interior of the machine shell into a suction chamber and a filtering chamber, a motor is fixedly arranged at the top end of the interior of the suction chamber, and a fan is fixedly arranged on an output shaft of the motor. A suction pipe penetrates through the front side of the machine shell, a pipeline with the two ends communicated with the suction chamber and the filter chamber respectively is installed on the supporting plate, a fixing plate is fixedly arranged in the filter chamber, a through groove penetrates through the fixing plate, a first filter screen is installed at the top end of the fixing plate, four L-shaped inserting blocks are fixedly arranged at the bottom end of the first filter screen, and four L-shaped inserting grooves are formed in the top end of the fixing plate. A fixi