1BZ-2.2/2.5/3.0/3.4-type 20 / 24 / 28 / 32 patches-traction hydraulic pressure offset heavy disc harrow is mainly applied to breaking up the clods of farmland before and after tillage, cutting straw, etc. And it can replace plough on prepared land. With high efficiency, reasonable using of power, strong ability to rake, strong ability to adapt to heavy soil, wasteland and weedy land. It absorbs advantages of similar foreign advanced products, designed according to the standards, with modular construction: rigid frame as main body, matched with hydraulic pressure transport rubber tire, spring leveling mechanism and sealed rolling bearing with spherical surface and square holes inside special for disc harrow, with reasonable structure; durable, easy to transport; with small radius of gyration, easy to adjust and maintain, etc.