The school was established in 1971. At First, the school was opened as Technical High School by the Department of Industrial Agriculture and Vocational Education, Ministry of Education at Kyar-Inn Village, Mawlamyaing Township. The school was reopened as Government Technical High School (Mawlamyaing) by Ministry of Education on May 5th, 2009. It is located in the east of Mawlamyaing-Mudon Highway Road, Milestone (7) Mile (6) Phalong, Kyar-Inn Village, Mawlamyaing Township. The area of the school is (33.76) acres.