Large stone crushing and screening device

The utility model provides a large stone crushing and screening device. The large stone crushing and screening device comprises a rack, a movable jaw and a screening machine located at the bottom of the rack, a fixed jaw toothed plate and an adjusting wedge block are arranged at the front end and the rear end of the rack correspondingly, one end of the adjusting wedge block is slidably connected with one side of the rear end of the rack, and the top of the adjusting wedge block is detachably connected with the top of the rear end of the rack through an adjusting bolt; the movable jaw is installed at the position between the fixed jaw toothed plate and the adjusting wedge block, a movable jaw toothed plate is arranged at one end of the movable jaw, the movable jaw toothed plate is fixedly installed on the movable jaw through a movable jaw connecting piece, a crushing area of an inverted-cone-shaped structure is formed between the movable jaw toothed plate and the fixed jaw toothed plate, the connecting plate a