A method of manufacturing a sheet molding compound, the method comprising: continuously supplying a wound bottom film by unwinding; applying a bottom resin on the supplied bottom film; continuously supplying a wound large tow carbon fiber by unwinding; spreading the supplied large tow carbon fiber for widening; cutting the widened large tow carbon fiber into a predetermined length by supplying to a cutting portion and distributing the cut large tow carbon fiber on the bottom resin; continuously supplying a wound top film by unwinding; applying a top resin on a lower surface of the supplied top film; and stacking the top film, which is supplied upside down to cover the top resin on the carbon fiber distributed on the bottom resin, on the bottom film, and pressing the bottom film and the top film for a predetermined pressure from upper and lower positions to laminate the bottom film and the top film such that the carbon fiber is impregnated with the resin; characterized in that at the cutting and distributing of the carbon fiber, the widened large tow carbon fiber is supplied to multiple cutting portions, which are disposed along a transport direction of the bottom film to be spaced apart from each other, to be distributed at positions spaced apart from each other by a predetermined distance on the bottom resin, with an intermediate resin being applied to be placed between the carbon fibers distributed to be spaced apart from each other; and wherein the method further comprises multi-dividing the large tow carbon fiber widely spread at the spreading the carbon fiber in a longitudinal direction of the fiber and forming three to six strands of small tow carbon fibers. continuously supplying a wound bottom film by unwinding; applying a bottom resin on the supplied bottom film; continuously supplying a wound large tow carbon fiber by unwinding; spreading the supplied large tow carbon fiber for widening; cutting the widened large tow carbon fiber into a predetermined length by supplying to a cutting portion and distributing the cut large tow carbon fiber on the bottom resin; continuously supplying a wound top film by unwinding; applying a top resin on a lower surface of the supplied top film; and stacking the top film, which is supplied upside down to cover the top resin on the carbon fiber distributed on the bottom resin, on the bottom film, and pressing the bottom film and the top film for a predetermined pressure from upper and lower positions to laminate the bottom film and the top film such that the carbon fiber is impregnated with the resin; characterized in that at the cutting and distributing of the carbon fiber, the widened large tow carbon fiber is supplied to multiple cutting portions, which are disposed along a transport direction of the bottom film to be spaced apart from each other, to be distributed at positions spaced apart from each other by a predetermined distance on the bottom resin, with an intermediate resin being applied to be placed between the carbon fibers distributed to be spaced apart from each other; and wherein the method further comprises multi-dividing the large tow carbon fiber widely spread at the spreading the carbon fiber in a longitudinal direction of the fiber and forming three to six strands of small tow carbon fibers.