| Sun Mengxin | |
| Birth Date: | 8 April 1993 |
| Birth Place: | Zibo, Shandong, China |
| Position: | Forward |
| Height Ft: | 6 |
| Height In: | 3 |
| League: | WCBA |
| Team: | Bayi Kylin |
| Number: | 13 |
| Career Start: | 2012 |
| Years1: | 2012–present |
| Team1: | Bayi Kylin |
Sun Mengxin (; born April 8, 1993) is a Chinese basketball player. She represented China in the basketball competition at the 2016 Summer Olympics.[1]