| Date: | 29 October–4 November (men) 5–11 November (women) |
| Edition: | 3rd (women) 2nd (men) |
| Prize Money: | $100,000 (women) $75,000+H (men) |
| Category: | ATP Challenger Tour ITF Women's Circuit |
| Surface: | Hard |
| Location: | Shenzhen, China |
| Champms: |  Miomir Kecmanović |
| Champmd: | Hsieh Cheng-peng / Christopher Rungkat |
| Champws: | Ivana Jorović |
| Champwd: |  Shuko Aoyama /  Yang Zhaoxuan |
The 2018 Shenzhen Longhua Open was a professional tennis tournament played on hard courts. It was the second (men) and third (women) editions of the tournament which was part of the 2018 ATP Challenger Tour and the 2018 ITF Women's Circuit. It took place in Shenzhen, China between 29 October and 11 November 2018.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
 Moldova, Republic of | Radu Albot | 89 | 1 | |
 Italy | Thomas Fabbiano | 106 | 2 | |
 India | Ramkumar Ramanathan | 124 | 3 | |
| India | Prajnesh Gunneswaran | 146 | 4 | |
| Serbia | Miomir Kecmanović | 149 | 5 | |
| Japan | Yūichi Sugita | 157 | 6 | |
| Japan | Go Soeda | 183 | 7 | |
 Canada | Filip Peliwo | 188 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| China | Zheng Saisai | 47 | 1 | |
| China | Wang Yafan | 83 | 2 | |
 Thailand | Luksika Kumkhum | 103 | 3 | |
| China | ||||
| Japan | Nao Hibino | 123 | 5 | |
 Uzbekistan | Sabina Sharipova | 127 | 6 | |
| Japan | Misaki Doi | 137 | 7 | |
| China | Duan Yingying | 138 | 8 |
The following players received wildcards into the singles main draw:
The following player received entry by a special exempt:
The following players received entry from the qualifying draw:
The following players received entry as lucky losers:
See main article: 2018 Shenzhen Longhua Open – Men's singles.
Miomir Kecmanović def. Blaž Kavčič 6–2, 2–6, 6–3.See main article: 2018 Shenzhen Longhua Open – Women's singles.
Ivana Jorović def. Zheng Saisai, 6–3, 2–6, 6–4See main article: 2018 Shenzhen Longhua Open – Men's doubles.
Sriram Balaji / Jeevan Nedunchezhiyan 6–4, 6–2.See main article: 2018 Shenzhen Longhua Open – Women's doubles.
Shuko Aoyama / Yang Zhaoxuan def. 
Choi Ji-hee / Luksika Kumkhum, 6–2, 6–3