Conventional fishpond sections are treated with replacement method, In order to avoid the negative impact on the environment during the process of silt transportation and filling materials production, in-situ solidification technology of soft soil was used to improve the silt at the bottom of fishponds. Firstly, the in-situ solidification equipment is introduced, and the application and advantages of the technology in fishpond sections are introduced in detail with the example of the experimental section of Chaoshan Ring Highway. The results of field tests show that the surface bearing capacity can meet the requirements after curing for 28 days, the uneven stirring has a great impact on the bearing capacity, and the relationship between the bearing capacity and depth of the solidified soil is obtained. Combined with field tests and relevant data, some methods of judging bearing capacity are evaluated, and the curve fitting formula suitable for in-situ solidification detection is derived.