Abstract: Based on the foundation project of Xiamen New Convention and Exhibition Center under construction,the sleeve valve pipe layered grouting technology is used to reinforce the silt soil layer to enhance the horizontal bearing capacity of the pile foundation. The horizontal bearing capacity of the pile foundation before and after treatment is tested by single pile horizontal static load test,and the soil surface after reinforcement is excavated and analyzed to verify the influence of sleeve valve pipe layered grouting technology on the horizontal bearing capacity of pile foundation in soft soil foundation. The results show that the sleeve valve pipe layered grouting technology can significantly improve the bearing capacity of soft soil layer and the horizontal bearing capacity of pile foundation in the reinforcement of soft soil foundation.