Water depth measuring device for selecting netting gear

The utility model provides a water depth measuring device for selecting a netting gear. The water depth measuring device comprises a spherical buoy, the center of the bottom of the spherical buoy is connected with a lead weight through a connecting rope; the length of the connecting rope is 30 meters; a right-angle buoy tail is arranged on the spherical buoy, an annular floating seat is sleeved outside the spherical buoy, and an ultrasonic water depth measuring instrument is arranged on the floating seat; and the other end of the rubber rope is connected with the central position of the spherical buoy. According to the water depth measuring device for selecting the netting gear, the spherical buoy, the connecting rope, the lead weight, the right-angle buoy tail and the ultrasonic water depth measuring instrument are used in a matched mode, the seawater depth can be known conveniently and rapidly, and then the biological collection netting gear meeting the requirement is selected autonomously; meanwhile, two w