The fastest way to get rid of cat fleas is to use a combination of medication and environmental cleaning. First, choose a pet-specific deworming medication, such as topical drops (containing fipronil) or oral deworming medication, and use it according to the weight of the cat. Adult fleas can usually be killed within 1-2 weeks.

Secondly, bathe your cat with a pet-specific flea shampoo, focusing on scrubbing areas where fleas tend to congregate, such as the neck and back, and rinse thoroughly. At the same time, thoroughly clean your cat's living environment, including its bed, toys, and carpets. Vacuum clean corners and crevices, and spray with a pet-safe flea spray to prevent any remaining eggs. Finally, regularly check your cat's fur and repeat the flea treatment every 2-3 weeks to ensure complete eradication. Avoid using human flea and tick products to prevent poisoning.