Illegal butchering is also banned while restaurants are forbidden from buying and serving pork that has not been quarantined, it added.
Experts say butchering and eating infected pork is the only way for humans to catch the disease.
Meanwhile, authorities in Sichuan have begun to manufacture large quantities of vaccine for swine, with an initial batch of between 700,000 to 800,000 doses produced so far, Xinhua news agency said. All the vaccines for pigs will be "strictly checked" by the ministry of agriculture before they are released on the market, it said.
Another Xinhua report quoted unnamed health officials as saying that no vaccines have yet been developed for humans.
The bacteria is endemic in Asia, North America and Europe, with the first recorded human case in Denmark in 1968. More than 200 cases of human infection have been reported globally since then, not counting the latest outbreak.
The epidemic has so far affected 155 villages in seven cities in Sichuan.
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