The invention relates to the technical field of crushing equipment, and in particular relates to a water drop type crusher for livestock feed processing. Air in the crusher is directionally guided, sothat dust in the air is conveniently directionally conveyed and collected, dust fall treatment is conveniently carried out on the crusher, granular feed and powdery feed in crushed feed can be conveniently classified and collected, the two groups of feed can be conveniently fed for different livestock scientifically, and practicability and reliability are improved. The crusher comprises a workbench, four groups of supporting legs, a motor base, a first motor, a first rotating shaft, a crushing bin, two groups of supporting plates, a feeding hopper, a first rotating sleeve, a crushing plate and a first filter screen, wherein the front left side, the rear left side, the front right side and the rear right side of the bottom end of the workbench are respectively connected with the top ends of the four groups of supporting legs; and the crusher also comprises a second motor, a second rotating shaft, a speed reducer, a third rotating shaft, a separation bin, a second rotating sleeve and four groups of fan blades.