Germany plans to ban the practice of people having sex with animals, sparking a threat of legal action from a group of "zoophiles," a newspaper reported on Monday.

The government plans to toughen animal protection laws - which currently only prohibit the practice if the animal is injured - with fines of 25,000 euros ($A31,250), reported the daily Taz.

Zoophiles are threatening action against the government if it proceeds with a bestiality ban. Credit:Heath Missen

The Bundestag's agriculture committee will discuss the amendment on Wednesday. It plans to send the measure to parliament by mid-December, said the report, citing committee chairman Hans-Michael Goldmann.

The group Veterinarians against Zoophilia says thousands of Germans exchange information online about sex with animals and that some farms rent out animals for sexual exploitation.