The invention provides a device for lowering and recycling a deep-sea gravity sampler, and belongs to the field of deep-sea sampling in marine engineering. The device comprises a plane support, a hydraulic rod, a column, a wheel, a brake pad, an intelligent telescopic rod, an electromagnetic snap ring, a pulley, a clamp rod and a vertical rod, wherein the plane support is connected to the hydraulic rod, the column and the intelligent telescopic rod; the intelligent telescopic rod is connected to the electromagnetic snap ring; and the plane support can be adjusted in position according to operation requirements, which is convenient for workers to add weights to the gravity sampler. The device for lowering and recycling a deep-sea gravity sampler provided by the invention, which is used forthe lowering and recycling process of the gravity sampler, saves manpower and time of the lowering and recycling operations and effectively improves the efficiency of the lowering and recycling of thegravity sampler to be more suitable for deep sea operations, can effectively ensure the security of workers during the operations at the same time, has the advantages of simple structure, low cost, easy installation and disassembly, strong operability and the like, and is suitable for operations such as deep-sea sampling and in-situ experiments.