The invention relates to the field of common cutters, in particular to a safety art knife. The safety art knife comprises an outer shell, a blade bracket, a buckle with a spring, and a blade; a speedlimiting device is arranged on the outer shell; and the speed limiting device comprises a contact roller, a conduction wire, an adjusting shaft and a cam. The safety art knife has the beneficial effect of capability of limiting the speed when the working speed of the knife is higher.