| Date: | 23–29 April (ATP) 30 April–5 May (WTA) |
| Edition: | 7th (ATP) 1st (WTA) |
| Category: | ATP Challenger Tour WTA 125K series |
| Location: | Anning, China |
| Surface: | Clay |
| Champms: |  Prajnesh Gunneswaran |
| Champmd: |  Aliaksandr Bury / Lloyd Harris |
| Champws: |  Irina Khromacheva |
| Champwd: | Dalila Jakupović / Irina Khromacheva |
The 2018 Kunming Open was a professional tennis tournament played on outdoor clay courts. It was the seventh (ATP) and first (WTA) edition of the tournament and part of the 2018 ATP Challenger Tour and the 2018 WTA 125K series. It took place in Anning, China, from 23 April–5 May 2018.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
 Canada | Vasek Pospisil | 77 | 1 | |
| Russian Federation | Evgeny Donskoy | 87 | 2 | |
 Australia | Jordan Thompson | 99 | 3 | |
| India | Ramkumar Ramanathan | 116 | 4 | |
 France | Quentin Halys | 118 | 5 | |
| France | Calvin Hemery | 130 | 6 | |
| Australia | Alex Bolt | 177 | 7 | |
 Korea, Republic of | Kwon Soon-woo | 208 | 8 |
The following players received wildcards into the singles main draw:
Bai Yan Li Yuanfeng Wang Ruikai Wang RuixuanThe following players received entry from the qualifying draw:
The following player entered as a lucky loser:
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| China | Peng Shuai | 42 | 1 | |
| China | Wang Yafan | 86 | 2 | |
 Belgium | Yanina Wickmayer | 98 | 3 | |
| China | Zheng Saisai | 124 | 4 | |
| Dalila Jakupović | 130 | 5 | ||
| Canada | Carol Zhao | 138 | 6 | |
| China | Han Xinyun | 150 | 7 | |
| China | Liu Fangzhou | 179 | 8 |
The following players received wildcards into the singles main draw:
Jiang Xinyu Peng Shuai Tang Qianhui Yang Zhaoxuan Zheng WushuangThe following players received entry from the qualifying draw:
Nagi Hanatani
Natalija Kostić Nika Kukharchuk| Country | Player | Country | Player | Rank1 | Seed | |
|---|---|---|---|---|---|---|
| Dalila Jakupović | Russian Federation | Irina Khromacheva | 124 | 1 | ||
| China | Han Xinyun | China | Ye Qiuyu | 233 | 2 | |
| China | Jiang Xinyu | China | Tang Qianhui | 244 | 3 | |
| India | Prarthana Thombare | China | Xun Fangying | 330 | 4 |
The following team received wildcard into the doubles draw:
Ren Jiaqi / Zheng WushuangSee main article: 2018 Kunming Open – Men's singles.
Prajnesh Gunneswaran def. 
Mohamed Safwat, 5–7, 6–3, 6–1See main article: 2018 Kunming Open – Women's singles.
Irina Khromacheva def. Zheng Saisai, 3–6, 6–4, 7–6(7–5)See main article: 2018 Kunming Open – Men's doubles.
Aliaksandr Bury / Lloyd Harris def. Gong Maoxin / Zhang Ze, 6–3, 6–4See main article: 2018 Kunming Open – Women's doubles.
Irina Khromacheva def. Guo Hanyu / Sun Xuliu, 6–1, 6–1