Sound velocity corrector of depth sounder

The utility model relates to a sound velocity corrector of a depth sounder. The depth sounder comprises a transducer and a transducer supporting frame, wherein the transducer is used to generate acoustic waves, and the transducer supporting frame is used for fixing the transducer. The sound velocity corrector of the depth sounder is characterized by comprising a reflecting plate and a connecting rod, wherein the reflecting plate is arranged right below the transducer, the connecting rod is fixed with the reflecting plate, the connecting rod and the transducer supporting frame are connected through at least two fixing rods, and scale values are arranged on the connecting rod. To reduce resistance of the reflecting plate in flowing water, a plurality of drag-reducing holes can be arranged in the reflecting plate. According to the sound velocity corrector of the depth sounder, the reflecting plate, the connecting rod with scale values are arranged, the connecting rod are fixed with the transducer supporting fram