The utility model discloses a tourniquet sterilizer, which comprises a sterilization bucket body, a bucket cover and a stainless-steel sieve body, wherein sieve holes with diameters slightly smaller than those of the tourniquets are uniformly distributed on the stainless-steel sieve body; the tourniquets are fixed on the sieve body via the rubber elasticity of the tourniquets; a handle is arranged on the sieve body; six stainless-steel elastic sheets are uniformly distributed at the periphery of the sieve body; and the sieve body is fixed on the inner wall of the bucket body via the elasticity of the stainless-steel elastic sheets. By adopting the tourniquet sterilizer provided by the utility model, the tourniquets can be completely soaked into sterilization liquid, so that the sterilization is complete, the sterilization liquid is prevented from corroding hands of nursing personnel, and the working efficiency is improved.