One is the maintenance of new aircraft. Also known as maintenance after commissioning, the new machine or overhauled agricultural machinery needs to be run-in. During the commissioning process, observe the operation of each working part, check and adjust it at any time, and find out if problems are solved. After the commissioning, the agricultural machinery must be fully maintained. The main contents of maintenance shall be carried out according to the instructions in the instructions for use of agricultural machinery. The second is maintenance, also known as daily maintenance. In order to maintain the best technical condition of agricultural machinery, agricultural machinery should be maintained before and after each day of operation. That is, cleaning, inspection, lubrication, adjustment, replacement, fastening, etc. The third is regular maintenance, that is, technical maintenance and technical maintenance. After a total of 200<500 hours of agricultural machinery work, a comprehensive maintenance and overhaul must be carried out. The specific approach is to comprehensively clean, inspect, lubricate, adjust, replace, tighten, and repair agricultural machinery. Repair or replace damaged or worn parts and reassemble them. The fourth is storage and maintenance, also called after-season maintenance. Agricultural machinery works seasonally, and after seasonal work is over, it often takes months or even more than half a year. It is important to do post-season maintenance. If the maintenance is not good and the storage is poor, the parts will be deformed, corroded and aged, and parts will be lost during storage. Not only shorten the useful life of agricultural machinery, but even cause the consequences that can no longer be put into use. Therefore, the farm hand should do a good job of storage and maintenance according to the requirements of the agricultural machinery manual. Fifth, special maintenance. Also known as targeted maintenance. This is generally a kind of targeted maintenance performed after an accident occurred in agricultural machinery. For example, accidents such as roll-over, water inflow into rivers, ditching, and collisions occur during the operation or transfer of agricultural machinery. Maintenance and repair of a certain component are required to restore the performance of agricultural machinery.