The invention discloses a precise positioning system for a powder hydraulic press based on a Delta controller. The precise positioning system comprises a servo hydraulic cylinder action part, a constant delivery pump, an energy accumulator and the Delta controller, wherein the servo hydraulic cylinder action part comprises a servo hydraulic cylinder, a servo valve connected with the servo hydraulic cylinder through an oil transportation pipeline and an oil tank connected with the servo valve; a displacement ruler is installed on the servo hydraulic cylinder; the constant delivery pump is connected with the servo valve through an oil transportation pipeline; the energy accumulator is connected with the constant delivery pump and the servo valve through oil transportation pipelines; the Delta controller is internally provided with a continuous command variation function, the continuous action changes of the servo valve are controlled by the Delta controller according to the continuous command variation function, and an I/O terminal of the Delta controller is electrically connected with the servo valve and the displacement ruler respectively. According to the precise positioning system for the powder hydraulic press based on the Delta controller, continuous control of the powder hydraulic press is achieved through the Delta controller, and the precise positioning system has the advantages of being high in control precision and convenient to use.