Device for improving caustic soda concentration uniformity of trough of mercerizing machine

The utility model belongs to the technical field of textile printing and dyeing, and relates to a device for improving caustic soda concentration uniformity of a mercerizing machine trough, which comprises a spraying device, a circulating trough and a mercerizing machine trough, and a first steel roller, a first group of mercerizing padders, a second steel roller and a second group of mercerizing padders are sequentially arranged in the mercerizing machine trough from front to back. The spraying device is arranged above the position between the second steel roller and the second group of mercerizing padders, a circulating liquid inlet pipe and a circulating liquid return pipe are arranged at the bottom of the mercerizing machine trough, a pressurizing motor is arranged on the circulating liquid inlet pipe, the circulating liquid inlet pipe and the circulating liquid return pipe are both connected with a circulating trough, and the circulating trough is further connected with a caustic soda supply trough. The