Sun Jiadong (Chinese: 孙家栋; born April 1929 in Fu County, Liaoning) is a Chinese scientist and an expert in carrier rocket and satellite technology. He has long served as a leader of Chinese satellite projects, and is currently the chief designer for the Chinese Lunar Exploration Program. Sun is a member of the Chinese Academy of Sciences and of the International Academy of Astronautics.
Sun enrolled in the Harbin Institute of Technology to begin preparatory courses in Russian when he was 18. Later he transferred to the automotive department. Around the time of the Chinese air force formation, he was chosen to join the army as a Russian translator. In 1951, Sun and 29 other soldiers were sent to study aircraft engines at the Zhukovsky Air Force Academy in the Soviet Union. In 1958, Sun graduated "with highest honor" and returned to China.
After returning to China, Sun served in the Fifth Research Institute of the Ministry of National Defense, conducting missile research. In 1967, he was appointed by Qian Xuesen to restructure the staff for satellite research. In addition to being in charge of the general design project for China’s first satellite, he also worked as the technical superintendent and general designer for both China’s first remote sensing satellite and recoverable satellite. He was also the chief designer of a second generation of special application satellites, such as communication, meteorological, and earth resource detecting satellites, as well as the Beidou-2 navigation system.
During the Cultural Revolution, Sun was appointed as the chief scientist of the Chinese satellite project. On April 24, 1970, the first Chinese space satellite, Dong Fang Hong I, was successfully launched. On March 3, 1971 the satellite "Shi Jian I" was launched. In 1975, China's first returning satellite was successfully launched. In 1984, China's first synchronized experimental communication satellite, Dong Fang Hong II was launched. Sun was the chief designer of all of them.
He was elected Member of the Chinese Academy of Sciences in 1991.
Since 2003, he has been the chief designer for the Chinese Lunar Exploration Program (CLEP).
- 1980 the honorary title of a working model in No 7 Engineering Industry Department
- 1984 the First-Class Merit Citation by the Ministry Of Aeronautics And Astronautics
- 1985 two special awards, among them the National Prize for Progress in Science and Technology
- 1999 "Two Bombs, One Satellite"Meritorious Award 
- 2009 National Science and Technology Award
- "Sun Jiadong, Father of China's Satellite Technology". CCTV.com. 2010-01-15. Retrieved 2010-05-20.
- "Sun Jiadong, from Dong Fang Hong to Chang-E". CRI.cn. 2008-09-25. Retrieved 2010-05-20.
- "Sun Jiadong". astronautix.com. Archived from the original on 2010-02-01. Retrieved 2010-05-20.
- "Gu Chaohao, Sun Jiadong awarded 2009 National Science and Technology Award" (in Chinese). The Ministry of Science and Technology of the People's Republic of China. 2010-01-11. Retrieved 2010-05-20.