The invention relates to a cutting table, in particular to a cutting device for excess materials of plastic products. The cutting device comprises an upper feeding table, a lower feeding table, a vertical adjusting frame, a tensioning linkage wheel, a driving mechanism, an excess material cutting knife, a lifting transmission wheel, a variable speed transmission wheel, a crushed material collector, a vertical frame plate and supporting legs. The right end of the upper feeding table is fixedly connected to the upper end of the vertical adjusting frame, and the lower end of the vertical adjusting frame is fixedly connected to the lower feeding table; the four corners of the bottom end of the lower feeding table are correspondingly and fixedly connected with the supporting legs; and the tensioning linkage wheel is fixedly connected to the front end of the upper feeding table, the upper feeding table is connected to the tensioning linkage wheel in a transmission mode, and the tensioning linkage wheel is connected to the lower feeding table in a transmission mode. The cutting device is internally provided with the upper feeding table and the lower feeding table, the upper feeding tableand the lower feeding table are matched to convey a plastic pipe to be processed, and the distance between the upper feeding table and the lower feeding table can be adjusted through the vertical adjusting frame to facilitate the use of plastic pipes with different diameters.