The invention provides a cam design numerical value implementation method for driving a voice coil component in a mechanical air distribution system of a high-pressure jet flow type sound wave rain enhancement device. The method comprises the following steps of: obtaining the track of the rocker arm idler wheel center through the rigid position relation of the three points of the rocker arm rotation center, the rocker arm idler wheel center and the rocker arm arc surface center in the rocker arm system and the position relation of the rocker arm arc surface center relative to the crankshaft angle (as shown in the description); digitalizing the track of the center of the rocker arm roller to form a track curve formed by connecting discrete points with a point set of {xk, yk}; for a track curve formed by discrete point connection, determining the normal direction of each point; according to the points {xk, yk} and the normal direction, determining the involute direction of each discretepoint along the normal direction distance r, and obtaining the coordinates of the involute points; connecting the points to form a molded line of the cam; and designing the cam by using the formed molded line of the cam. The method provided by the invention is beneficial to improving the continuity and smoothness of the voice coil driving cam, enhancing the discontinuity of high-pressure jet flowair and exciting strong sound waves.