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The application discloses a sludge brick blank drying method and relates to the technical field of drying. The method comprises the following steps: obtaining a surface evaporation rate and an internal moisture migration rate in a brick blank drying process; comparing the two rates with a preset matching relation algorithm; adjusting and controlling drying conditions according to a comparison result to make the two rates tend to match; and starting a fault-tolerant mechanism to maintain the drying process when data is abnormal or the adjustment and control fails. The application can solve product quality problems caused by the fact that the surface evaporation rate and the internal moisture migration rate do not match in the drying process.