Oil storage tank liquid sampling device

The utility model discloses a liquid sampling device for an oil storage tank. The winding and unwinding structure is arranged on the supporting seat, and the winding and unwinding structure is used for winding and unwinding an oil dipstick, an electric wire and a pair of lifting ropes which are arranged on the winding and unwinding structure; the sampling structure is respectively connected with the dipstick, the electric wire and the pair of lifting ropes and is driven by the pair of lifting ropes to lift; the sampling structure comprises a plurality of sampling parts which are arranged in parallel along the lifting direction; the sampling part is connected with an external power supply through the electric wire, provides sampling power and is used for sampling liquid in the liquid storage tank. The utility model is used for solving the problems that in the prior art, when the sampling pipe is turned over, the sampling pipe is easy to shake, so that certain mixing is generated among all layers, the sampling