The invention relates to a rapid molding tool for cylindrical helical compression springs. The rapid molding tool is divided into two parts, namely, a profiling mold and a profiling mold support. The profiling mold is mainly composed of a mandrel, a profiling mold body and a winding mandrel clamping mechanism. One end of the mandrel is a morse cone. During working hours, the morse cone is clamped on a lathe chuck. The other end of the mandrel integrates the profiling mold body, the winding mandrel clamping mechanism and the mandrel through pins and a key to form the profiling mold. The profiling mold support is also composed of three components, namely, a cone profiling nailing mechanism, a counter weight mechanism and a base, and the three components are combined together through screws and pins. A steel wire clamping mechanism made of bakelite is integrated onto the base of the profiling mold support and used for guiding steel wires.