Impact crusher for closed feeding and dust falling

The invention discloses an impact crusher for closed feeding and dust falling, which comprises a first mounting frame, an impact crusher body is fixedly mounted on one side of the first mounting frame, a screening mechanism is arranged at the bottom end of the impact crusher body, a driving mechanism used in cooperation with the impact crusher body and the screening mechanism is arranged at the lower end of one side of the first mounting frame, and a closed feeding mechanism used in cooperation with the impact crusher body is arranged at the top end of the first mounting frame. When a first group of material collecting frames containing stones starts to communicate with second material falling through groove, the stones in the first group of material collecting frames are sequentially guided into the impact crusher body, so that closed feeding of the impact crusher body is realized, the phenomenon that the stones jump to hurt a human body when the impact crusher body works can be effectively avoided, dust gen