A Xi'an court found Yang Dacai guilty of taking bribes and possessing "a huge amount of property of unclear origin", state-run news agency Xinhua said.
The bribes and illicit property would be confiscated by the state treasury, Xinhua added.
Several Chinese officials have been tried for corruption in recent months.
Yang pleaded guilty to corruption charges last week, saying he could not explain where wealth of 5m yuan ($817,000; £527,195) came from.
Yang was formerly head of a work safety body in Shaanxi province.
He attracted attention after photos showed him smiling at the scene of a bus crash which killed 36 people in August 2012.
Angry internet users then found several pictures of him wearing luxury watches. They argued that Yang could not have afforded the watches on his civil servant salary.
Following a probe, Yang was sacked for "serious wrongdoing" and then expelled from the Communist Party in February.'Legal income'