The utility model discloses a fan structure convenient to disassemble. A fan is mounted in a case; a fan mounting notch is formed on a case wall of the case; and a positioning reed is arranged at the edge of the fan mounting notch, and located inside the case wall of the case. A fan plate comprises a fan mounting surface and a positioning surface, wherein the fan is fixed on the fan mounting surface; a clamping groove is formed on the positioning surface; a clamping bulge is arranged on the positioning reed; when the positioning surface of the fan plate is pushed into the case along the edge of the fan mounting notch provided with positioning reed, the positioning surface presses the positioning reed until the clamping groove moves to the clamping bulge; the clamping bulge is clamped into the clamping groove; at this point, the fan mounting surface is clamped into the fan mounting notch; and the fan plate and the case wall are fixed by a bolt on the side of the fan mounting notch, opposite to positioning reed, so that the fan is mounted into the case. According to the fan structure convenient to disassemble, the structure is simple; the mounting and the maintenance of the fan required in a servo drive product are facilitated; and meanwhile the material cost and the processing cost are lowered.