The cultural layer of the Jingtoushan site dates back about 7 800-8 300 years, approximately 1 000 years prior to the Hemudu culture. As a prehistoric shell mound site that has never been discovered in previous archaeological work in Zhejiang region, the Jingtoushan site was selected as one of the top ten new archaeological discoveries in 2020. The cultural accumulation of the Jingtoushan site is 5-10 m below the sea level and is covered with thick saturated marine sedimentary silt. The cultural remains include ash pits and food storage pits, shell deposits, utensil processing and food processing sites, etc. The relics unearthed from the site include more than 100 wooden objects such as oars, handles and pestles, as well as more than ten woven fabric such as mats, baskets, pack baskets, fish covers, fans, fishing nets and fine ropes. The woven fabric are made from reeds, awn grass, bamboo and other raw materials, and are scattered in the marine silt along with various relics. Due to various factors in the burial environment, the woven fabric have undergone severe degradation, resulting in structural decay and fragility and reduced mechanical strength, posing significant challenges for safe separation and extraction. Taking the cohesive soil of the Jingtoushan site as the research object, various analysis methods such as X-ray diffraction, potentiometric titration and ion chromatography were used to analyze the mineral composition and contents of the site soil, the content of organic matters and humic substances such as humic acid and fulvic acid, as well as the ion contents and pH value of the soil impregnation solution. The analysis results indicate that the soil at the site is alkaline, with similar X-ray diffraction peaks, mineral composition and contents, and high contents of organic matter and soluble salts. The presence of iron oxides in soil clay minerals, as well as humic substances such as humic acid and fulvic acid in organic matters, are important soil binding substances, causing the soil texture of the site to be cohesive and difficult to disperse, which is not conducive to the separation and extraction of fragile woven fabric. In order to safely separate and extract fragile woven fabric, it is necessary to convert organic or inorganic soil binding substances in the soil to reduce the binding effect on soil particles. Organic binding substances in soil can be treated with oxidants or alkaline solutions to make the organic matters in the soil to be oxidized and decomposed or converted into soluble salts, thereby achieving the dispersion of cohesive soil. However, this method of decomposing and transforming soil organic matters through oxidants or alkaline solutions, while completing soil dispersion, will inevitably bring potential harm to fragile woven fabric. In addition to humic organic binding substances such as humic acid and fulvic acid, there are also inorganic binding substances present in the form of iron oxides in cohesive soils. In the pre-study of soil dispersion methods, HRP with (O, O) as the coordinating atom was selected as a complexing agent for the Fe element, and the inorganic binding substances in the form of iron oxides were complexed and transformed at the room temperature. The research results indicate that under mild conditions, 30 mmol/L HRP could effectively disperse cohesive soil. This dispersion method could provide a reference for the separation and extraction of woven fabric unearthed from the Jingtoushan site and other similar sites.