Underwater terrain measuring device

The utility model discloses an underwater topography measuring device which comprises an RTK measuring instrument, a grounding probe and a rope, the RTK measuring instrument is connected with the grounding probe through a telescopic rod, the middle of the rope is bound on the upper portion of the telescopic rod, and the length of the rope is larger than the distance between two banks of a water area. By pulling ropes on two sides of a water area, the RTK measuring instrument and the bottoming probe move along the bottom surface of the water area so as to obtain measurement data of underwater topography; besides, the RTK measuring instrument is connected with the ground contact probe through the telescopic rod, so that the length of the telescopic rod can be adjusted in advance according tothe water depth condition to adapt to different water areas. The device is simple and convenient to operate, greatly shortens the measuring period and the measuring cost, and is obvious in economic benefit. 本实用新型公开了一种水下地形测量装