The utility model discloses a dynamic grouting system for a water-rich fine silt stratum. The dynamic grouting system comprises a parameter detecting module, an intelligent sensing drilling module, an intelligent grout configuring module and an intelligent material metering module. The parameter detecting module is arranged in the part close to a drill bit and used for measuring mechanical parameters in the drilling process and stratum parameters needed in grouting. The intelligent sensing drilling module is connected with the parameter detecting module and used for reading measuring data obtained by the parameter detecting module, processing and displaying the measuring data and transmitting the measuring data to the intelligent grout configuring module. The intelligent grout configuring module is used for configuring grouting grout according to the parameters transmitted by the intelligent sensing drilling module and controlling conveying of the grout. The intelligent material metering module is connected with the intelligent grout configuring module and used for metering added raw materials according to grout configuring parameters transmitted by the intelligent grout configuring module and fully stirring the raw materials in a grout stirring tank for standby application. By means of the dynamic grouting system, automatic grouting is achieved, and influences of human factors on the grouting process are reduced.