1BZ series heavy-duty off-set disc harrows are mainly used for cleaning away stubble of plants before tillage, or uncultivated land and in sticky heavy clay soil fields. They could also be used as a plow for primary tillage in dry cultivated fields. Their discs have been divided into front and rear two gangs notched discs, the dislocation of the design for front and rear disc gang, and disc gang on both sides of V to disc overall non-symmetrical, work Angle can be adjusted. The surface of the field after harrowing is level and the crushing and clearing ability of the harrow is satisfactory.