The invention discloses a hulling and cleaning machine for fresh camellia oleifera fruits through combination of cutting, grinding and twisting, and a method. The hulling and cleaning machine comprises a classifying mechanism, a hulling mechanism and a cleaning mechanism, wherein the classifying mechanism is a combined structure of an inner cylinder and an outer cylinder, circular array holes which are in helical guidance and of which the diameters are increased along a spiral motion direction are formed in the inner wall of the inner cylinder, guard boards of which the sizes correspond to the diameter sizes of the circular array holes are arranged in the outer cylinder in a partitioning manner, and blanking holes with sizes corresponding to the sizes of the circular array holes are formed in low points between the guard boards; the hulling mechanism is a cutting, grinding and twisting combined device consisting of arc-shaped boards, rollers and high-speed turning knife flywheels, each high-speed turning knife flywheel is mounted at the middle part of the corresponding arc-shaped board, the distance from each high-speed turning knife flywheel to the nearest end of the corresponding roller is slightly smaller than the average diameter of camellia oleifera fruits, and the gap between each roller and the corresponding rubber arc-shaped board can be adjusted by a gap adjusting mechanism; and the cleaning mechanism is a conveyor belt structure, and certain damping materials are used for covering the surface of a conveyor belt. According to the hulling and cleaning machine disclosed by the invention, the hulling and cleaning efficiency of the fresh camellia oleifera fruits is improved mainly.