|Representing South Korea|
|1991 Copenhagen||Mixed doubles|
|1994 Hiroshima||Mixed doubles|
As a player, Kang was best known for winning the 1997 All England Open Badminton Championships men's doubles title with Ha Tae-kwon. In the same year, Kang and Ha also won major titles at the Swedish Open and the Korea Open and the following year, they won the Badminton Asia Championships. In the 1994 Asian Games, he won two silver medals, in mixed doubles and in the men's team event. Kang's last international tournament was the 2005 Canadian International, where he appeared in two finals and won the men's doubles title.
Kang began coaching the Korean national team in 2009 and spent one year as the head coach of the national junior team. He was named as the head coach of the senior national team in December 2016, with his term to run from January 1, 2017 to October 30, 2018.
- "BKA tournament personnel data". Badminton Korea Association. Retrieved 17 February 2020.
- Choi, In-young (29 December 2016). "National Badminton Team: New Start with Kang Kyung-jin as Head Coach". Yonhap. Retrieved 26 January 2017.