The invention discloses a design method of a controllable inclined strut clutch wedge block, the wedge block comprises an upper cam and a lower cam which are respectively abutted against raceways of an inner ring and an outer ring, and the arc radius of the upper cam, the position coordinate or polar coordinate of the arc center of the lower cam and the arc radius of the lower cam of the wedge block are determined through design. According to the invention, a complete algorithm flow is adopted to solve the radius of the upper cam arc, the radius of the lower cam arc and the position relationship of the lower cam arc relative to the upper cam arc; compared with the original inclined strut clutch wedge block serialization specification design, the inclined strut clutch wedge block serialization specification design has the advantages that the use adaptability is improved, and the wedge block can be designed more flexibly to adapt to different application scenes. The controllable clutch wedge with the optimal wedging performance can be comprehensively evaluated according to the contact force and the wedge angle, and the excellent transmission performance of the controllable inclined strut clutch is obtained.