It is aimed to provide a resin product manufacturing system, a manufacturing method, a resin molding machine and a mold capable of easily manufacturing a burr-free finished product in injection molding or the like.In a resin product manufacturing system for forming an intermediate product by a resin molding machine 101 and manufacturing a finished product by deburring the intermediate product by a deburring device, the resin molding machine 101 is provided with a mold 155 including a storing portion 153B for storing an overflow resin 130A (burr 132) formed at a site corresponding to the entire periphery of an intermediate product in a matching surface 153A, the intermediate product having the overflow resin 130A (burr 132) integrally formed over the entire periphery thereof is formed by the mold 155, and the deburring device cuts the overflow resin 130A (burr 132) integrally formed over the entire periphery of the intermediate product together with the burr to manufacture a finished product.