River channel bottom topography measuring device

The river channel bottom topographic measurement device comprises an unmanned detection ship, a detachable connecting plate is vertically arranged at the bottom of the unmanned detection ship, and fixing blocks are arranged on the two sides of the connecting plate. According to the device, the connecting plate is arranged at the bottom of the unmanned detection ship, the anti-tilting plates are arranged on the two sides of the connecting plate, the contact area of the unmanned detection ship and river water is increased through the connecting plate and the anti-tilting plates, and when wind blows to the unmanned detection ship, the unmanned detection ship transmits the wind to the connecting plate and the anti-tilting plates to drive the connecting plate and the anti-tilting plates to rotate, so that the anti-tilting plates are driven to rotate; when rotating, the connecting plate and the anti-tilting plate are in contact with river water, the rotating power of the connecting plate and the anti-tilting plate