The invention discloses a miniature combined harvester. The harvester is characterized in that the outer sides of two lower circular pipes of a grain scraping plate (7) are both additionally provided with a spring (15), grain outlets of a grain lifting cylinder are kidney-shaped holes (16), a reel supporting rod (14) is a three-segment split supporting rod, a connection hinge plate (22) is additionally arranged, one end of the connection hinge plate is connected with a chassis of the miniature combined harvester, the other end of the connection hinge plate is hinged to a cutting table threshing cylinder assembly and a lifting box (12) separately, a hinge frame of a lower box welding element is connected with the chassis through hinges, an upper hinge sleeve on the upper box welding element is hinged to the connection hinge plate, an oil cylinder fixing hinge frame of the upper hinge is hinged to an oil cylinder, and the other end of the oil cylinder and the cutting table threshing cylinder are hinged to form a crank-rocker mechanism. The combined harvester can reduce rice ears and weeds in threshed grains and reduce the production cost by 10%, a cutting table can ascend and descend as a whole, and it is ensured that the angle between the cutting table and the horizontal plane is not changed.