Deepwater sampler

Deepwater sampler, the device comprises a plurality of handheld rods which are detachably connected, a base is fixed at the bottom of each handheld rod; a fixed groove is formed in the base; wherein the sampling bottle is fixed on the handheld rod, a lifting plate is fixed at the top of the handheld rod at the top layer, a sliding through hole is formed in the lifting plate, a sliding sleeve is fixed at the bottom of the lifting rod, an upper limiting ring and a lower limiting ring are fixed on the handheld rod at the bottom layer, and the lifting rod penetrates through the sliding through hole and the sliding sleeve and is sleeved on a handheld rod body between the limiting rings; the sampling bottle is fixedly connected with the lifting rod through a connecting rod and comprises a bottlebody, water inlet holes are formed in the periphery of a bottle neck of the bottle body, a piston is arranged in the bottle neck and fixedly connected with the connecting rod, a balance weight ball is suspended and fixed to