They complained of stomach ache and diarrhoea on Friday, one day after eating at a wedding ceremony held at a local hotel in Weirong township of Jingning county, state-run news agency Xinhua reported.
All of them were rushed to a local hospital.
Fifteen people were discharged from the hospital later, while 41 are still undergoing treatment.
The hotel has suspended operations and health authorities have launched an investigation.
