The utility model discloses an open shelf type fluctuation towed vehicle close to sea bottom, which comprises a vehicle body, a rudder wing driver and an underwater control center, wherein the vehicle body is an open type regular hexahedron frame structure formed by supporting posts, a fore body and a stern, the fore body is in a tian-shaped structure formed by fixed wings, a stern rudder wing and the fixed wings form a square structure, two small rudder wings are further arranged on the fore body, and the vehicle can obtain better effects in set height, set depth and climbing angle control by controlling a motion combination of rudder wings on the fore body and the stern. The rudder wing driver and the underwater control center are installed inside the support posts, the whole device is light, small in size and has the advantages of modularization and replaceable parts, is capable of continuously working for a long time, and suitable for serving as a carrier of underwater detection equipment which is higher in requirements for depth, height from seabed and stability.