The invention discloses a voltage arranging mode of bus merging unit double configuration based on OLP switching of a 110 kV system in an intelligent substation double-bus wiring mode. A set of bus PT merging units identical with an existing one in configuration is added to each segment of bus intelligent control cabinet, two merging units are identical in configuration, and each segment of bust intelligent control cabinet is further additionally provided with a set of complete OLP optical fiber automatic switching device and also comprises a remote expert intelligent judging system. The remote expert intelligent judging system is used for realizing abnormal signal automatic grasping and remotely switching control. The remote expert intelligent judging system comprises a bus voltage monitoring relay wiring loop and a remote intelligent control switching logic loop. According to the invention, the related equipment and the logic control loop are added, self-healing and seamless control switching of faulted equipment are realized, the reliability of the operation of the power grid is substantially improved, equipment maintenance can be arranged at any time, and the convenience of overhaul and maintenance is improved.