The utility model relates to a marine equipment field discloses a sonar measuring equipment cloth is replace and is received mechanism under water, including the base, be fixed with lead screw bearing frame and guide rail on the base, the frame is put to cloth, including locking couple and mounting bracket, the pole is put to cloth, including no. I cloth that connects gradually put the connecting rod, the connecting rod is put to no. II cloth and the connecting rod is put to no. III cloth, the pivot, one end is the circle axle, and the other end is two articulateds, half arc hinge, and wherein half arc hinge of a slice is fixed with the circle axle, and another is mobile, and it is tight to put the bar cramp with cloth through screw locking behind the hinge lock. The utility model discloses the cloth mode of putting is simple, and the structure is reliable, and work finishes the rotatory cloth in back puts the pole and can retrieve equipment to the ship board limit, need not to dismantle alright along with the ship's navigation or to carry out the secondary experimental, the utility model discloses have better suitability, can carry on in the boats and ships exterior string limit of various shapes and size.