A household rotary disc type mower comprises a frame, and comprises a cutter head base (4) and a grass collecting box (5) disposed on the frame, and a cutter head (2) is disposed on the cutter head base (4). A crawler-type walking mechanism (7) is disposed on the frame. The crawler type walking mechanism (7) comprises a pair of chain wheels hingedly connected on the frame and crawler belts cooperating with the chain wheels. Each crawler belt is formed by multiple crawler belt plates hingedly connected from heads to tails. Each crawler belt plate comprises a metal plate (4-3) and a cover plate (4-5) disposed from bottom to top; and two sides of the metal plate (4-3) are each provided with a rubber plate (4-2). The metal plate (4-3), the rubber plate (4-2) and the cover plate (4-5) are fixedly connected. The inner surface of each crawler belt plate is provided with an engaging hole allowing the cover plate (4-5), the rubber plate (4-2) and the metal plate (4-3) to pass through, and the engaging hole matches teeth of the chain wheels. The mower can reduce production costs and use costs.