English：

In order to reduce the waste of resources and environmental pollution and improve theengineering properties of filling soil, the waste feather line was added to the lightweight mixed soil, andthe strength of the lightweight mixed soil containing the waste feather line was evaluated by uniaxialcompression test. The results show that with the increase of cement content or the decrease of watercontent and waste feather line content, the bulk density of lightweight mixed soil increases. When thecontent of waste feather line increases, the uniaxial compressive strength of lightweight mixed soilincreases first and then fluctuates, the optimum dosage of waste feather line is 1 0% ~ 2 0%. When thecement content increases or the water content decreases, the uniaxial compressive strength of lightweightmixed soil increases. The deformation of lightweight mixed soil structure is constrained by the addition offeather line to a large extent. Due to the outstanding tensile strength of the feather line and theoutstanding friction resistance at the interface between the feather line and the lightweight mixed soil, theshear resistance of the lightweight mixed soil sample is improved. This experimental study provides a newidea for the recycling of typical waste materials such as waste fishing nets, waste tires, waste cement bagsand woven bags.