The utility model discloses a dust prevention and noise reduction device for a swing type crusher. Dust cover and base, an inner cover is arranged at the upper end of the base; a bearing is arranged on the inner cover; a dustproof device inner cavity is formed in the upper end of the bearing; a rechargeable battery is arranged at the bottom end in the inner cavity of the dustproof device; a motoris arranged at the left end of the rechargeable battery; a connecting rod is arranged at the upper end of the motor; the multistage dustproof structure is complete and compact in structural design andconvenient to use, the inner cover structure is adopted, the padding embedded in the embedding groove of the inner cover is matched with the dustproof cover in a sealed mode, and the cavity in the lower portion of the inner cover completely covers the bearing and the bearing seat, so that multistage dust prevention is achieved, the dustproof effect is good, and the service life of the bearing isgreatly prolonged.