A die structure of a hollow plastic blow-molding machine belongs to the technical field of blow molding machinery. The die structure comprises a die core, a die orifice ring, an elastic ferrule, a compression ring and one group of elastic ferrule thixotropic devices, wherein the die core corresponds to the central position of a die orifice ring cavity, the die orifice ring is fixed with the bottom of a heating cylinder of a die head mechanism, an elastic ferrule flange matching groove is formed in the lower part of the die orifice ring cavity, the upper part of the elastic ferrule forms an elastic ferrule flange, the lower part of the elastic ferrule extends out of the die orifice ring cavity, the elastic ferrule compression ring is fixed with the die orifice ring, the lower part of an elastic ferrule compression ring cavity forms a slider cavity, an ejector pin hole is formed in the side wall of the slider cavity, and one group of elastic ferrule thixotropic devices are fixed with the die orifice ring and matched with the ejector pin hole. The die structure is characterized in that each of the group of elastic ferrule thixotropic devices comprises an oil cylinder retaining bracket, an oil cylinder bottom base, a top base, an oil cylinder bushing, an oil cylinder piston rod, a slider ejector pin, a cooling medium partition board, a cooling medium connector and an adjusting nut. The service lifetime of the elastic ferrule is ensured, the structure is simple, the cost is low, and work stability and reliability are ensured.