In the first 1-2 months before harvesting the busy season, technicians are required to do a thorough and thorough maintenance of the combine harvester until it is confirmed that it can function properly throughout the harvest period. Pay attention to safety during maintenance. After the overhaul, the harvester is to be commissioned: first, turn the rotating parts of the machine by hand, and if there is no abnormality, start the engine and slowly increase the speed; first try the local, then the whole machine, in order to find the problem; When observing the operating status of each component, when it is running at the rated rotational speed, stop it once every 30 minutes to check whether the temperature rise of each transmission bearing is normal and whether there is any looseness in the fastening joints. If there is any problem, it shall be timely. Properly resolve it. If it is a newly purchased machine, follow the steps required in the instructions to make a good trial run. It is equipped with the tools and parts that are commonly used in the operation, such as various types of bolts, gaskets, and grease. In-depth work areas in advance, a detailed understanding of the distribution of crops to be harvested, growth, maturity and roads, etc., to develop a most reasonable harvesting route. Before the formal harvesting, a representative field trial cut should be selected to find out and solve the problems that have been overlooked or difficult to solve in the above-mentioned maintenance or test run. At the same time, users should carefully solicit the user's requirements for harvest quality and make certain targeted adjustments to the machine.