Cats will not be poisoned if they eat centipedes, because centipedes themselves are a medicinal material, so under normal circumstances cats will not be poisoned if they eat centipedes. However, centipedes contain venom. If a cat is injected with venom when eating centipedes, it may cause poisoning or other abnormalities. It is best to observe the cat's physical condition and send it to a pet hospital for examination and treatment if any abnormalities are found.