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This utility model provides a locking tag device for a manual directional valve, relating to the field of manual directional valve technology. It includes a directional valve body and a support plate fixedly mounted on the directional valve body. Three operating levers are rotatably connected to the directional valve body. Through holes are provided on the support plate, and a handle passes through these holes and connects to a sliding plate. The handle is used to move the sliding plate so that the stop holes on the support plate and the sliding plate coincide or separate. This utility model has a reasonable and simple structure, and is quick and accurate to operate. When operating the manual directional valve, moving the handle moves the sliding plate so that the sliding plate and the stop holes on the support plate are misaligned, thereby locking the operating levers. Therefore, this locking tag device improves upon the original operating handle device, effectively eliminating safety hazards during operation, avoiding misoperation during use, and improving operational safety.