Industrial production rose 9.2% last month, the National Bureau of Statistics said, compared to an increase of 9.5% year-on-year (y/y) in June.
Output for the first seven months of 2012 rose 10.3%, the National Bureau of Statistics said.
Separately, retail sales, the main gauge of consumer spending, also slowed, rising 13.1% in July compared with the same month last year, the bureau said.
Retail sales had gained 13.7% in June. They rose 14.2% (y/y) in the first seven months of 2012.
China's economy grew 7.6% in the second quarter from the same period the year before to log its worst performance since the depths of the global economic crisis in 2008-2009.
Authorities have taken measures including slashing interest rates and loosening restrictions on bank lending to boost growth, which has been dented by weakness in overseas economies including the European Union, a key trading partner.
Also Thursday, the bureau said that China's urban fixed asset investments rose 20.4% in the first seven months of 2012 compared with the same period the year before.
Fixed asset investments are a key measure of government spending on infrastructure.
Earlier, the bureau said that China's inflation slowed in July to a two-and-a-half-year low.