Soft soil quality investigation device and investigation method thereof

The invention relates to the technical field of geological exploration, in particular to a soft soil quality exploration device and an exploration method thereof. The invention provides a soft soil quality investigation device which comprises a sampling assembly, the sampling assembly comprises a spiral barrel, a sampling barrel, a lifting plate and a telescopic bag, a power transmission spiral and a sampling rotating spiral are arranged on the upper portion and the lower portion of the sampling barrel, and the sampling rotating spiral is spirally meshed with the spiral barrel. Through the mutual cooperation of the device frame, the sampling assembly, the compression assembly, the guide assembly and the aerodynamic force control assembly, the sampling barrel rotatably descends to go deep into a soil layer for sampling, a soil sample is bottomed, the sampling barrel rotatably ascends after sampling, the soil sample in the sampling barrel is compressed through the compression assembly after sampling, then the b