The 2010 indoor season saw Su establish himself as one of Asia's best jumpers as he cleared 8.27 m in Nanjing in March, breaking both Huang Geng's 14-year-old Chinese indoor record and Mohamed Salman Al-Khuwalidi's Asian indoor record. This remained the best performance indoors that year and ranked him joint seventh in the world for 2010. Su set an outdoor best of 8.11 m to win at the Osaka Grand Prix. He improved upon this with a jump of 8.17 m at the Chinese Championships to defeat Li Jinzhe and win his second national title. As a result, he was selected to represent China at the 2010 Asian Games in his home province of Guangdong. Korea's Kim Deok-Hyeon won the competition, but Su took his first major medal with his jump of 8.05 m for the silver.