2017–18 Premier League Tournament Tier B
The 2017–18 Premier League Tournament Tier B was the second division of the 30th season of first-class cricket in Sri Lanka's Premier Trophy. The tournament was contested by nine teams, starting on 15 December 2017 and concluding on 18 February 2018.
| Dates | 15 December 2017 – 18 February 2018 |
|---|---|
| Administrator(s) | Sri Lanka Cricket |
| Cricket format | First-class cricket |
| Tournament format(s) | Round-robin |
| Host(s) | Sri Lanka |
| Champions | Negombo Cricket Club |
| Participants | 9 |
| Matches | 36 |
| Most runs | Kashif Naved (805) |
| Most wickets | Gayan Sirisoma (55) |
Panadura Sports Club finished top of the table in the 2016–17 Tier B tournament, but it was runners-up Sri Lanka Ports Authority Cricket Club who were promoted to Tier A due to a match-fixing scandal that resulted in a match between Panadura SC and Kalutara Physical Culture Club in January 2017 being declared null and void. They were replaced in Tier B by Galle Cricket Club after they were relegated from the 2016–17 Tier A tournament. In another change from the previous season, Negombo Cricket Club replaced Kalutara Physical Culture Club, who dropped out of the first-class system.
Negombo Cricket Club won the tournament and secured promotion to Tier A, after finishing top of the points table ahead of Lankan Cricket Club.