Stone crusher for water conservancy

The utility model relates to the technical field of stone crushers, and discloses a water conservancy stone crusher which comprises a machine body, a stone crushing roller is fixedly installed on the upper portion in the machine body, a filter screen is fixedly installed on the inner wall of the machine body, an arc-shaped base is fixedly installed at the bottom of the machine body, and a rotating device is arranged below the filter screen. According to the water utilization stone crusher, when stone passes through a stone crushing roller and then passes through a filter screen, the stone subjected to primary treatment falls on an arc-shaped base, when a rotating device works, the stone is stirred, secondary stone crushing is conducted on the stone through a small stone crushing roller while stirring is conducted, and the stone crushing efficiency is improved. And a front push plate, a spring and a pulley are arranged at the bottom of the rotating device, an arc ball is arranged at the upper end of the discha