NSW Labor would ban the sale of puppies from pet stores if elected to government in March.

Labor leader Luke Foley will announce the policy on Saturday, along with a ban on large-scale puppy farms that would limit the amount of breeding dogs to 10 per farm. In January, the RSPCA raided a farm in Copeton in northern NSW and found up to 375 dogs living at the property.

Mr Foley said that if elected, Labor would end cruelty and exploitation in commercial dog breeding by tightening regulations for the whole industry.

"Labor will crack down on breeders rearing puppies in terrible conditions just to make a buck," he said.