Production method for avoiding uneven surface color of cutter steel hot-rolled plate

The invention relates to a production method for avoiding uneven surface color of a cutter steel hot-rolled plate. The process comprises the steps of smelting, continuous casting, hot rolling and cold rolling pickling. The method comprises the following steps: 1) adjusting the water spraying amount of a water spraying header at the upper part of a hot-rolled layer cold area to be large in middle and small in two sides; cleaning impurities on the surface of the steel belt by using a reverse spraying device; (2) the cold water conductivity of a hot rolling layer is smaller than 650 microseconds, and the chlorate concentration is smaller than or equal to 70 g/L; (3) cover annealing is conducted after hot rolling, gas is continuously purged before the temperature is increased to 650 DEG C, and the purge time is longer than 3 h; and 4) cold rolling pickling, wherein pickling solution concentration and pickling temperature are controlled. By adjusting the use standard of the cooling water and the water amount of th