The invention relates to automatic tooth profile machining equipment. The automatic tooth profile machining equipment comprises a machine base, an upright post, a horizontal displacement supporting plate, a milling mechanism, a stepping type feed mechanism, a longitudinal displacement mechanism and a rotary indexing mechanism, wherein the upright post is connected to the machine base; the horizontal displacement supporting plate is installed on the upright post; the milling mechanism is connected with the horizontal displacement supporting plate; the horizontal displacement supporting plate is used for adjusting horizontal movement of the milling mechanism; the stepping type feed mechanism is installed on the upright post and is used for driving the horizontal displacement supporting plate to do a vertical feed motion up and down; the longitudinal displacement mechanism is installed on the machine base; the rotary indexing mechanism is arranged above the longitudinal displacement mechanism; the longitudinal displacement mechanism is used for adjusting the machining position of a work piece; the rotary indexing mechanism can realize high-precision indexing rotation by virtue of a servo control system; and the operation of the overall machine is realized by virtue of an automatic electric appliance control system. As special equipment for tooth profile machining of a metal circular plate type product, the automatic tooth profile machining equipment can realize machining at any tooth quantity and any types of tooth profiles and indexes, and is high in machining precision.