Precision-improved underwater positioning device for marine surveying and mapping

The invention relates to the technical field of marine surveying and mapping, and discloses a precision-improved underwater positioning device for marine surveying and mapping, the precision-improved underwater positioning device for marine surveying and mapping comprises a ship body, a paddle assembly, a telescopic frame, a hinge machine, a clamping assembly, a surveying and mapping bin, a pneumatic assembly, a radar and a camera, the paddle assembly is mounted at the rear end of the ship body, and the telescopic frame is hinged to the middle of the ship body; the hinge machine is installed at the bottom of the ship body, the clamping assembly is installed at the bottom of the telescopic frame, the surveying and mapping bin is connected with the telescopic frame in a clamped mode through the clamping assembly, the pneumatic assemblies are symmetrically installed on the two sides of the surveying and mapping bin, and the radar and the camera are fixedly connected to the two ends of the surveying and mapping b