1. Adjust left and right. The rotary tiller is lifted off the ground to check whether the height of the tip of the left and right ends is the same, and can be adjusted by the right promotion lever. 2. Adjust before and after. First, lower the rotary tiller to the depth of the request, and change the length of the upper adjustment rod (the central railing) so that the intermediate transmission gearbox is in a degree (or the central transmission output shaft is parallel). 3. Adjustment of the height of promotion. The angle of inclination of the universal joint when it is raised does not exceed 30 degrees. Usually the tip of the blade can be turned and blanked only about 20 cm from the ground. When working in the field, the highest promotion position should be restricted. 4, the adjustment of the performance of broken soil. Normally, the forward speed is changed to adjust the performance of the soil. However, the rotary tiller with the intermediate gearbox can also be adjusted by changing the speed of the cutter shaft. 5. Adjustment of the depth of cultivation. When the unit is equipped with a dragging machine with a powerful adjustment and position adjustment hydraulic system, the position adjustment should be used to stop the adjustment and avoid damage to the rotary tiller. When the rotary tiller reaches the depth of the ploughing, the limit adjustment screw is used to block the position adjustment handle, so that the depth of each ploughing is consistent.