Water conservancy project vertical water stop structure and construction method thereof

The invention discloses a water conservancy project vertical water stop structure and a construction method thereof. The water conservancy project vertical water stop structure comprises a dam body, a water inlet channel is formed in the upper end of the side wall of the dam body, a sliding groove is formed in the bottom wall of the water inlet channel, a water containing block is slidably arranged in the sliding groove, a water containing groove is formed in the water containing block, and a first moving rack is connected to the water containing block; a first moving groove allowing the first moving rack to be slidably arranged is formed in the bottom of the sliding groove, a storage groove is formed in the top wall of the dam body, an extending baffle is slidably arranged in the storage groove, the extending baffle is connected with a second moving rack, and a second moving groove allowing the second moving rack to be slidably arranged is formed in the bottom of the storage groove; and a gear is rotationall