Harvester and screening mechanism for harvester

The invention discloses a harvester and a screening mechanism thereof. The screening mechanism comprises a shell, wherein the interior of the shell is divided into an upper screening area and a lowermaterial collection area; the upper screening area and the lower material collection area are divided by virtue of a vibrating screen; an air suction mechanism is further arranged on the upper part ofthe upper screening area; and the harvester is characterized in that the vibrating screen inclines upwards from front to rear and comprises a front conveying mechanism and a rear screening mechanism,the rear end of the vibrating screen is connected with an eccentric wheel moving mechanism, the front end of the vibrating screen is disposed in a linear slideway, the linear slideway inclines upwards from front to rear, the inclination angle is greater than the inclination angle of the vibrating screen, the screening mechanism is provided with a screen mesh, a plurality of rows of serrated screen strips obliquely facing u