The utility model belongs to the technical field of salt field retaining dams, and particularly relates to a retaining dam check gate which comprises a red
brick slope protection body, a vertical
pile structure and a supporting structure. An inspection pedal is arranged at the top of the red
brick slope protection body, a pipeline penetrates through the inspection pedal, and a main gate body is arranged on the outer side of the pipeline; the vertical
pile structure comprises a plurality of
glass fiber reinforced plastic vertical piles arranged at the bottom of the inspection pedal, and the
glass fiber reinforced plastic vertical piles are symmetrically distributed on the two sides of the main gate body and arranged in a matrix mode. The supporting structure comprises an inclined supporting plate, a vertical supporting plate and a transverse supporting plate, and the inspection pedal and the red
brick slope protection body are supported through the supporting structure. The device is convenient and fast to
mount, is beneficial to improving the working efficiency, and solves the problems that in the related technology, soil sampling on a
salt pan site is relatively difficult, and under general conditions, large equipment is needed for
cofferdam and dam blocking, the cost is high, the time is long, and the working efficiency is low.