Mathematics competition in middle schools has a long history. It is generally believed that it started at 1894 and was organized by the Hungarian mathematics community to commemorate the mathematician Eotvos Roland. Comparing mathematics competition with sports competition, it is the former Soviet Union that is linked with ancient Greece, the birthplace of science. She called the math competition the math Olympics. In the first half of the 20th century, different countries organized all kinds of mathematics competitions at all levels, first in schools, then in regions, and then in the whole country, and gradually formed a pyramid competition system. The further development of national competitions naturally creates the necessary conditions for the formation of the highest international competition. Professor Roman, a Romanian mathematician, put forward an initiative in 1956 and held the first International Mathematical Olympiad (IMO) in Romania in July 1959. Only Bulgaria, Czechoslovakia, Hungary, Poland, Romania and the Soviet Union participated. After that, it will be held once a year (1980 only once), and the number of participating countries and regions will gradually increase. At present, there are more than 80 teams participating in this competition. China participated in the International Mathematical Olympics for the first time in 1985. After more than 40 years of development, the operation of the International Mathematical Olympiad has gradually become institutionalized and standardized, and a set of established routines has been followed by previous hosts. 1. Objective To stimulate teenagers' mathematical ability; Stimulate young people's interest in mathematics; Discover the reserve army of scientific and technological talents; Promote the exchange and development of mathematics education in various countries. This activity is held once a year in July. 3. The host country takes turns to undertake the project, and the funds are provided by the host country. 4. Participants are middle school students, with 6 people in each team, and 2 mathematicians are sent as team leaders. 5. The test questions are provided by the participating countries, then selected by the host country and submitted to the examiners' committee for voting, resulting in 6 test questions. The host country does not provide test questions. After the test questions are determined, they will be written in English, French, German, Russian and other working languages, and the team leader will translate them into the national language. 6. The exam is divided into two days, 4.5 hours a day, and 3 questions. Six players from the same team were assigned to six different examination rooms to answer questions independently. The answer sheet will be judged by the national team leader and then negotiated with the coordinator designated by the organizer. If there is any objection, it will be submitted to the examiner's Committee for arbitration. 7 points for each question, out of 42 points. 7. There will be a first prize (gold medal), a second prize (silver medal) and a third prize (bronze medal) in the prize competition, with a ratio of about1:2: 3; About half of the contestants won the prize. The award criteria of each session are related to the results of the current exam. IMO is not a competition between teams, so there is no team award, but all teams attach great importance to the ranking of team total scores. Judging from the situation in recent years, China, Russian, American, German, Romanian and other countries are stronger. 8. The examiners' committee is composed of leaders of various countries and the chairman designated by the host country. This chairman is usually the authority on mathematics in this country. There are seven duties of the examiners' committee: 1), selecting examination questions; 2), determine the scoring standard; 3) Accurately express the test questions in the working language, and translate and approve the test questions translated into the languages of the participating countries; 4) During the competition, determine how to answer students' questions in writing; 5) Resolve the different opinions on grading between individual team leaders and coordinators; 6) Determine the number and scores of medals.