The invention provides a cleaning method for stipa purpurea fruits. The cleaning method for the stipa purpurea fruits comprises the steps that stipa purpurea infructescences are dried; the stipa purpurea infructescences are placed in a stainless steel screen in bundles, people put on rubber gloves and knead the stipa purpurea infructescences, and the fruits are separated from large fruit spurs and awns and fall onto a lower rubber mat; the fruits and small fruit spur residues are placed in a seed separator, and proper wind force is selected for separating the plump fruits from the wormed fruits, the empty and flat fruits and most of the residues; the screen is used for further removing the residues; people pick up the remaining residues; and the cleaned fruits are packaged with paper bags. In order to solve the existing problems that the stipa purpurea fruits are difficult to clean and time and labor are wasted, the novel method for quickly cleaning the stipa purpurea fruits is provided, and can effectively improve the cleaning efficiency and cleaning quality of the stipa purpurea fruits, reduce the storage space occupied by the stipa purpurea fruits in a cold storage and enable the fruits to be conveniently taken for use in future.