The invention discloses an inclined slicing device for processing strip food. The inclined slicing device comprises a fixing base; a driving box is fixedly connected to the upper part of the fixing base; a motor mounting base is fixedly connected to the right lower part inside the driving box; a motor is fixedly connected to the upper part of the motor mounting base; a driving bevel gear is fixedly connected to the output end of the motor; a longitudinal driving shaft is connected to the middle of the upper part of the driving box in a rotating mode through a bearing; a driven bevel gear is fixedly connected to the lower end of the longitudinal driving shaft and meshes with the driving bevel gear; a rotating disc is fixedly connected to the upper part of the longitudinal driving shaft; a longitudinal supporting rod is fixedly connected to the middle of the upper part of the rotating disc; and a plurality of clamping grooves are formed in the outer side of the longitudinal supporting rod. Compared with the prior art, the inclined slicing device has the beneficial effects that the structure is simple, the use is convenient, a rotary cutting mode is adopted, the food can be cut into oval slices when the strip-shaped food is cut so that the food can be more attractive after being cooked, and the inclined slicing device is worthy of popularization.