Safety protection device for water conservancy and hydropower

The safety protection device for water conservancy and hydropower comprises a supporting column, a base is fixedly installed at the bottom of the supporting column, a sliding column is fixedly installed at the top of the supporting column, and a sliding block is installed on the outer surface of the sliding column and located above the supporting column in a sliding mode. The top of the sliding column is fixedly provided with a top sliding block. The utility model relates to the technical field of engineering protection monitoring equipment. According to the safety protection device for water conservancy and hydropower, the base, the left ruler and the right ruler are assembled, then the base is installed at the water bottom of a water area needing to be measured, and when a water gauge needs to be replaced due to abrasion, a constructor sleeves an old water gauge with the new right ruler and the left ruler which are in an open state; the scales on the water gauge can be kept in a clear and observable state a