The appearance and taste of the apple pulp is affected by the oxidation and browning of apples exposed to the air, which occur during the production process of small and medium-sized apple pulping machines. In response to this problem, a small and medium-sized intermittent apple vacuum pulper were designed. Based on the technical process of apple pulping, the working principle and basic structures of the apple vacuum pulper are analyzed; the operational process of the machine and its guarantee of "vacuum degassing" were discussed in detail. Experimental validation showed that the designed intermittent small and medium-sized apple vacuum pulper could significantly reduce the browning and improve the quality of apple pulp.