In an open letter to Spain's legislature released on Thursday, Coetzee called bullfights "a throwback to a time when people took no heed of the feelings of animals." which he said had no place in 21st century Spain.
Cape Town, South Africa-born Coetzee is a noted opponent of animal cruelty, and touches upon the theme of nonhuman suffering in his books, including The Lives of Animals.
Spain is divided over bullfighting. The ruling Popular Party wants to enshrine it as part of Spain's national heritage, but some regional governments have enacted bans.
Spain's parliament has been debating the issue since February.