The invention discloses a decontaminating and fragrant-lasting pet shampoo and a production method thereof, and belongs to a pet shampoo. The pet shampoo is prepared from, by mass, 62 parts of deionized water, 0.01-0.5 part of ethylenediamine tetraacetic acid disodium, 0.1-5 parts of U20 carbomer, 0.1-5 parts of triethanolamine, 1-36 parts of sodium laureth sulfate, 1-46 parts of ammonium lauryl sulfate, 0.1-1 part of polyquaternium-10, 0.1-3 parts of amino siloxane microemulsion and the like; by compounding polyquaternium-10, cationic guar gum, vitamin E acetate, arginine and other effectivesubstances for decontaminating and fragrant lasting, the decontaminating and fragrant-lasting effects of the compound shampoo are further improved through matched contents, the shampoo is suitable fordog pets with strong body odor, and bloodstains, milk stains, juice and other common stains can be efficiently hydrolyzed by natural plant active protease contained in the shampoo.