Crusher for crushing plant stalks

The invention discloses a crusher for crushing plant stalks. The crusher comprises a shell; a feeding hopper is arranged at the upper end of the shell; a crushing chamber is arranged below the feedinghopper; crushing rollers are arranged in the crushing chamber; a motor for driving the crushing rollers is arranged outside the shell; crushing teeth are annularly arranged on the outer surfaces of the crushing rollers; ejector pins are arranged at intervals between the adjacent crushing teeth; the tail ends of the ejector pins are fixedly arranged on rubber sleeves; a mounting base is arranged outside the shell; an oil cylinder is arranged on the mounting base; a hole expanding rod is arranged on a piston rod of the oil cylinder and is movably inserted into the rubber sleeves; and a discharging hopper is arranged below the crushing chamber. The crusher for crushing the plant stalks has the advantages that plant residues adhering to the crushing rollers can be separated from the crushingrollers, and therefore the