Screening device convenient to mount for coal mine production and processing

The screening device comprises a main body, dust collection boxes are arranged on the two sides of the main body, a supporting plate is connected to one side of the main body, a fixing block is arranged at the top end of the main body, a through hole is formed in the inner wall of the main body, and a draught fan is installed at the top end of each dust collection box. And a vibration motor is mounted at the top end of the supporting plate. Through the arrangement of the vibration motor, the shaft rod, the eccentric block, the first screen frame, the second screen frame, the first screen, thesecond screen, the spring and the stop lever, the vibration motor drives the eccentric block to vibrate through the shaft rod, the eccentric block drives the first screen frame and the second screen frame to vibrate, and the first screen frame and the second screen frame screen a coal mine. And when the first screen frame vibrates at high frequency, the stop lever limits the vibration amplitude ofthe first screen frame, s