1BZD hydraulic pressure pair setting heavy-duty disc harrow of twenty-eight blades, thirty-two blades, and thirty-six blades are mainly applied for stubble cleaning before farmland cultivation, ground compaction disrupting, straw crushing, farmland hacking after plowing, ground leveling and soil moisture conserving. The product can replace plows for soil plowing, and features high performance efficiency, reasonable power utilization, strong soil crushing capability, smooth surface and loose soil after cultivation, and strong adaptability to heavy soil, wasteland and weed infested land. The disc harrow absorbs the advantage of similar foreign advanced products. In accordance with the standard design, the disc harrow adopts combination structure and takes integrated rigid harrow frame as the mainstay, e with hydraulic up-and -down transport rubber tires, spring leveling mechanism, sphere-outside and s roller bearings specially used for disc harrows. The disc harrow features rational structure, durability, convenient transport, small radius of gyration, easy adjustment and maintenance and other advantages.