In a statement emailed to Reuters on Tuesday, the restaurant chain said half of the audits would be done unannounced and would be carried out by third party auditors and internal teams.
Industry insiders had told Reuters that suppliers in China often knew about audits in advance.
McDonalds will push for more video monitoring at its Chinese suppliers and send more quality control specialists to all meat production facilities, it added.
The firm has also created a new role to oversee food safety governance in China and will launch a hotline later this year for whistleblowers to report food safety issues.
Last week, Chinese police arrested six staff from McDonalds supplier OSI Group following allegations in July that workers at its Shanghai Husi plant used expired meat and doctored food production dates.
McDonalds has suspended supply from all Husi plants in China and is reviewing its relationship with parent OSI pending an investigation by Chinese regulators.
The OSI scandal dragged in KFC-parent Yum, coffee chain starbucks and Burger King Worldwide among others. It also spread to Hong Kong and Japan.
China is McDonalds third largest market by the number of outlets and the number one market for KFC-parent Yum. McDonalds currently has over 2,000 restaurants in mainland China.
However, Chinas $1 trillion food processing industry struggles with fragmented suppliers and a lack of traceability, meaning auditors and food chains often remain one step behind in keeping supply chains in check.