The invention discloses a pineapple slicing device. The pineapple slicing device comprises a base and is characterized in that the base is provided with a pineapple bucket for bearing a pineapple, which is vertically through, and a baffle for preventing the pineapple from falling off is arranged under the pineapple bucket; the base is also provided with a rotating mechanism for driving the pineapple bucket to rotate circumferentially and a cutting mechanism for cutting the head and the tail of the pineapple in the pineapple bucket driven by the rotating mechanism to rotate; one side of the upper surface of the base is provided with an L-shaped fixing plate, a peeling mechanism capable of peeling the pineapple inside the pineapple bucket is arranged on the L-shaped fixing plate, and on oneside of the peeling mechanism, the L-shaped fixing plate is provided with a slicing device capable of slicing the peeled pineapple; the base is also provided with a turnover mechanism capable of driving the pineapple bucket to rotate through the rotating mechanism to pour the pineapple out of the pineapple bucket.