Because of the continuous development of the times, people's living standards are constantly improving, so the Online dictionaries are becoming increasingly popular. And I think it has advantages and disadvantages.There are many benefits for people in social life. Online dictionaries are becoming more and more popular, which can greatly improve the efficiency of people's work and study, and can also help people learn a lot of new knowledge.But there are also some disadvantages. For example, online dictionaries will make people dependent, and use for a long time will make people myopia worse. I think that although online dictionaries are very practical, we should also use them appropriately. The knowledge of books should prevail. Sometimes there are errors in online dictionaries.Reasonable use of online dictionaries can better enhance our cultural knowledge.Therefore, we must learn to use online dictionaries reasonably, and we must not rely too much on them, and we must not resist not using them. Only in this way can we continue to work and study better.