The animal came from a farm in the southern Chinese province of Guangdong and China has been suspended.
The government-run slaughterhouse in Sheung Shui will be closed for cleansing and disinfection, she added.
Last month around 6,000 pigs were culled after the virus was detected in the province. Supply from the border was suspended. Suspended for a week during the disinfection of slaughterhouse.
Pork is a staple of Chinese food. Hong Kong importing the mainland.
After African swine fever spread more than half of China, where the virus was detected.
Chinese officials have said hundreds of thousands of pigs were culled in the area
With some of the world’s most populated streets, Hong Kong remains on the alert to diseases. In 2003, some 300 people with severe acute respiratory disease (SARS).
The virus is not dangerous to humans but is fatal to pigs and wild boar.