Device and method for injecting microorganism slurry to reinforce soil body at opening of starting well of tunnel

The invention belongs to the technical field of tunnel soil body reinforcement, and particularly discloses a device and method for reinforcing a tunnel originating well opening soil body by injecting microorganism slurry, the device comprises a storage part, a transmission part and an injection part, the storage part comprises two thermotanks, and the two thermotanks are used for containing bacterial liquid and cementing liquid respectively; the transmission part comprises a multi-communication miniature high-pressure pump, and two independent liquid channels are arranged in the multi-communication miniature high-pressure pump; the injection part comprises a grouting guide pipe and a rotary grouting head, the grouting guide pipe comprises two hollow semi-cylindrical pipes, and the longitudinal straight faces of the two hollow semi-cylindrical pipes are attached together to form a cylinder with two independent longitudinal cavities; the tops of the two independent longitudinal cavities are respectively connect