Crusher with adjustable jaw plate spacing

The invention discloses a crusher with adjustable jaw plate spacing. The crusher comprises a fixing frame, jaw plates, a pushing device, a driving device and an adjusting device, wherein the jaw plates comprises a first jaw plate and a second jaw plate, and the pushing device drives the first jaw plate to swing up and down; and the adjusting device comprises an isolating plate, adjusting pieces penetrating through the isolating plate, connecting pieces connected with the adjusting pieces, sliding plates fixed below the connecting pieces and sliding blocks in sliding fit with the sliding plate,the isolating plate is fixed at the same outer end of two side plates, the connecting pieces are fixedly connected with the second jaw plate, the sliding blocks are fixed below the side plates, and the connecting pieces and the sliding plates are driven to move along the sliding blocks by adjusting the length of the adjusting pieces on the two sides of the isolating plate, so that the shortest distance between the second