Processing device for stepped gap of plastic groove-shaped part

The invention discloses a processing device for a stepped gap of a plastic groove-shaped part, and belongs to the technical field of processing of plastic parts. The processing device comprises a control structure, a rack (1), a worktable (2) which is arranged at the front side of the rack (1) in a manner of sliding in the left-right direction, a workpiece fixing structure (3) which is arranged on the worktable (2) in the front-back direction, a pushing cylinder (4) which is arranged on the rack and is used for driving the worktable (2) to slide leftwards and rightwards, a cutting structure (5) which is arranged at the rear side of the rack (1), and a strip-shaped supporting structure which is in match with a workpiece by shape, wherein the cutting structure (5) comprises a horizontal cutting structure and a vertical cutting structure; a horizontal cutting blade (6) is arranged on the horizontal cutting structure, and a vertical cutting blade (7) is arranged on the vertical cutting structure and vertically st