An object of the invention is to provide a molding system and a production method for a composite molded body having excellent adhesion between carbon fiber and a thermoplastic resin and having a high degree of freedom in molding. The molding system includes: braiding means that braids a cylindrical material made of a composite material of carbon fiber and a thermoplastic resin; and warm pressure means that warm molds the braided cylindrical material into the composite molded body while pressuring the cylindrical material from the inside.