The invention relates to automatic adapter machining equipment with a cam mechanism, comprising a distribution disk (1), a distribution guide rail (2), a manipulator (3), a cam mechanism (4), a spindle assembly (5), a transverse tool rest (6), a base (7) and workpieces (8). In work, the workpieces (8) enter the manipulator (3) in order along the distribution guide rail (2) under the action of the distribution disk (1), the manipulator (3) puts the held workpieces (8) into a spindle (5-1) and clamp the workpieces (8); a turning tool (6-3) carries out operations of turning an excircle, chamfering and punching a center hole on the workpieces (8); and longitudinal tool bits (4-7) on the cam mechanism (4) carry out local correction on the workpieces (8), and then the workpieces (8) are blown to a designated location by a high pressure air pipe at the center of the spindle (5-1). According to the invention, the spindle adopts a servo motor to control the direction and angle of the workpieces, and therefore, the speed is increased by more than three times, and the machining cost is greatly lowered.