The invention discloses a high-stability underwater measuring platform, and belongs to the technical field of marine monitoring equipment. The underwater measuring platform comprises a main floating body, a buoyancy compartment, a ballast tank, a vibration damping device, connecting rods and a buffering tie belt; an underwater monitoring instrument is installed in a pressure-resistant cover of thevibration damping device; the vibration damping device is installed in the main floating body through elastic connecting cables, the two lateral sides of the main floating body are respectively connected with the buoyancy compartment and the ballast tank through the connecting rods, and the buoyancy compartment, the main floating body and the ballast tank are vertically distributed; the measuringplatform is horizontally floated under water by adjusting the position of a balancing weight in the ballast tank; the underwater monitoring instrument in the vibration damping device is electricallyconnected with a storage unit installed in the ballast tank, and the storage unit is used for receiving and saving detection information of the underwater monitoring instrument. According to the underwater measuring platform, through split structure design and reasonable overall configuration, the attitude stability of the underwater platform is improved, and the flow noise impact of the platformis reduced.