Compound fertilizer roller type screening machine

The invention discloses a compound fertilizer roller type screening machine which comprises an adjustable support. To-be-screened raw materials enter a screening barrel from a feeding hopper, a motordrives a rotating shaft and a rotating sleeve to rotate through a transmission belt and straight gears, and the rotating directions of the rotating shaft and the rotating sleeve are opposite. The rotating shaft and rotating rods are utilized for driving shifting pieces to shift the raw materials, and the situation that the raw materials cannot penetrate a screen in time, and the screening efficiency is reduced is avoided; meanwhile, the rotating shaft drives a rack to rotate together, extruding rods on a disc and arc blocks achieve extrusion intermittently, under the spring action, the rack isdriven to do reciprocating motion, the rack and a sector gear are engaged, the rotating rods and the shifting pieces are driven to rotate, and the raw materials are further stirred so as to improve the screening efficiency; a