The invention discloses an efficient filter device of a coarse cereal machine. The efficient filter device comprises a base; a support is fixedly connected to the upper end of the base; a processing barrel is arranged at the upper end of the support; a cavity is formed in the support, and a cross frame is arranged in the cavity; a discharging pipe is formed at the lower end of the processing barrel and sleeved with the cross frame; a box is formed in the cavity and internally provided with a filtering mechanism; a drainage pipe is arranged at the inner bottom of the cavity; the upper end of the drainage pipe penetrates through the box and is connected with the filtering mechanism; and the end, away from the box, of the drainage pipe penetrates through the side wall of the cavity and extends to the outer side of the support. The efficient filter device is stable in structure, easy to operate, scientific and reasonable in design, short in production cycle, good in filtering effect and convenient to clean and replace.