The basic principle of the air separation unit is to condense the air into liquid by low-temperature distillation, and then separate the air according to the evaporation temperature of each component. The main production cost of air separation unit in normal operation is power consumption. Reducing reactive power production and reducing oxygen venting rate are important measures to save power consumption. The operators of air separation unit shall be educated and trained in safety technology and operation skills, and take up the post with certificate after passing the examination. The operator shall be familiar with and strictly abide by the operation method of the post.