Rotary cultivators are the implements that are used in conjunction with tractors. The selection of product models must be adapted to local conditions, and the models should be determined based on the tractors and local natural conditions that they already own. When selecting a rotary cultivator, "check, see, hear, touch" and other means can be used. Check whether the product has promotion certificate, certificate, “three guarantees†certificate and recent inspection report; see the appearance quality of the product, whether the paint is peeled off, and whether the burr is cleaned up; if there is condition, it is better to perform empty operation and listen to the sound is normal Whether the operation is flexible and in place, whether the vibration of the machine is too large or not; whether the bearing part is overheated after touching the empty machine, and whether the lubrication part is leaking oil.