The invention discloses a method for manufacturing a rubber roller through centrifugal melting injection. According to the method, a die is included and comprises a shaft core, a circular pipe, two clamps and a die forming material. The shaft core is fixed to the inner center of the circular pipe through the two clamps located at the two ends of the circular pipe. Each clamp at least comprises a liquid injection hole communicating with a cavity between the shaft core and the circular pipe. The die forming material is located in the cavity between the shaft core and the circular pipe and is liquid or solid. When the die forming material is the solid, the die forming material needs to be heated and melted into the liquid, the die is arranged on a rotation driving device, the inner wall of the circular pipe is covered with the liquid through centrifugal rotation to form a pipe die, and finally a roller blank is formed in the pipe die in an injection molding manner; and in the above process, the coaxiality between the pipe die and the shaft core can be well guaranteed through centrifugal forming, and accordingly, the coaxiality between the outer circle surface of the roller blank obtained through injection molding of the pipe die and the shaft core can be guaranteed as well; and the surface is smooth, the problems that previously, machining is difficult, and a die is complex are solved, and accordingly the production cost is reduced for enterprises.