The invention relates to an agricultural machine for harvesting cassava and provides a small shaking type cassava harvester. The small shaking type cassava harvester is composed of a quick-shaking type hydraulic jack, a large plunger rod, a small piston rod, a reversing valve or a stop valve, a frame, a main beam, a rear beam, stand columns, a stand column middle beam, a lifting frame, a chain wheel, a chain, rolling wheels, a suspension arm, a flexible piece, an operation rod, a quick stem clamp, wheels, supporting legs and the like. The reversing valve or the stop valve is used, the shaking and non-shaking functions of the large plunger rod, the suspension arm and the quick stem clamp can be achieved by pressing down or lifting up the operation rod, and thus cassava can be vertically shaken and pulled up in the pulling process. The small shaking type cassava harvester is capable of saving labor, small in cassava breakage rate, high in productivity, convenient to operate, small, light, convenient to carry, firm, high in reliability, low in cost, capable of saving energy, environmentally friendly, low in use cost, capable of adapting to small mountainous field parcels, small rugged field parcels, farmland with complex terrain, farmland with other interplanted crops and wet and muddy farmland, capable of being used for pulling other plants and crops and wide in application.