The tighter rules come after several countries including Spain, the Netherlands, Czech Republic and Turkey were forced to recall hundreds of thousands of shoddy masks and pieces of protective gear imported from China.
The Canadian government last week said that about one million face masks purchased from China failed to meet proper standards for healthcare professionals.
Dutch health officials last month recalled over half a million Chinese masks — which had already been sent to hospitals –- after complaints that they did not close over the face properly, or had defective filters.
China is producing more than 116 million masks per day, according to official figures.
It has exported more than one billion masks this year so far, commerce ministry official Li Xingqian told reporters.
China has also signed contracts to export medical materials worth $1.41 billion to 74 countries and six international organizations, he added.
In the first two months of the year, a staggering 8,950 new manufacturers started producing masks in China, according to business data platform Tianyancha.
Despite the nationwide crackdown, businesses were continuing with illicit production of medical equipment since it was a way to earn “quick money”, Chinese customs official Jin Hai said earlier this month.
Over 31.6 million faulty masks and 509,000 protective suits destined for export had been confiscated by port officials as of mid-April, he said.