The invention relates to a multi-edge milling removal rate calculation method for a carbon fiber composite and belongs to the field of machining. According to the calculation method, first, an optical microscope is utilized to measure the geometrical morphology of a multi-edge milling cutter according to geometrical characteristics of the multi-edge milling cutter and movement characteristics of the cutter in the milling process, and the geometrical characteristics of the multi-edge milling cutter are acquired; and then, a calculation formula for the rotation angle of cutter teeth when the material is cut through the cutter in a down milling or up milling mode is given by selecting various machining consumptions in the milling process, the material removal rate per unit time of the cutter is calculated, and calculation of the material removal rate of the cutter is realized accurately. Through the material removal rate calculation method for the multi-edge milling cutter, a complicated geometrical structure of the multi-edge milling cutter can be considered, accurate calculation of the material removal rate is realized, and a basis is provided for evaluating the machining efficiency of the milling cutter. The method is simple in calculation and reliable in result and has a good engineering application prospect.