The invention relates to a fixed blade device with adjustable bend angle in circumferential direction, belonging to the technical field of impeller machinery, comprising a blade, a wheel boss, a stream guide hammer, a front end plate, driving gears, driven gears, shim blocks; wherein, the driven gears and the shim blocks fixed on the stream guide hammer form the wheel boss, the back ends of the shim blocks are fixed on the stream guide hammer, the driven gears are embedded between the shim blocks, the blade is fixed on the driven gears, the driving gears are arranged in the center the driven gear encircles and are meshed with the driven gears, the front end plate and the shim blocks are fixed together by screws; the invention features simple structure and rational design; in addition, on the precondition of retaining the original blade structure parameters, gear drive structure is arranged inside the wheel boss to achieve the purpose that the bend angle in circumferential direction can be continuously adjusted, thus simultaneously ensuring that the intersection line of the blade at the wheel boss can remain unchanged.