Abstract: The drill-type lunar soil sampling technology is one of the key technologies of China Lunar Exploration Project. This paper presents a soft extraction mechanism applied in deep lunar soil drilling and sampling. The mechanism is capable of packing the lunar soil samples in-situ to keep the samples' stratification information. Kevlar is chosen as the fiber material of the soft extraction bag used for packing and collecting the samples. Through appropriate weaving process, the bag was produced in a dense, thin and flexible style according to the technical requirements. The bag was then undergone a series of test such as turning force, mechanical property and coating function measurement and analyses to verify its availability for deep drill-sampling lunar mission.