The invention discloses a creatine jubase detection reagent. The reagent disclosed by the invention consists of a reagent R1 and a reagent R2 according to a volume ratio being 4 to 1, wherein the reagent R1 consists of an imidazole buffer solution, glucose, nano particles, N-acetylcysteine, ethylenediaminetetraacetic acid disodium salt, adenosine diphosphate, coenzyme I, adenine ribonucleotide, pyruvate decarboxylase, 6-phosphogluconic dehydrogenase, hexokinase and sodium dodecyl benzene sulphonate; and the reagent R2 consists of an imidazole buffer solution, phosphocreatine, a preservative and sodium dodecyl benzene sulphonate. Pyruvate decarboxylase and gamma-Fe2O3 nano particles are added into the creatine jubase detection reagent disclosed by the invention, so that interfering substances in a serum sample can be effectively eliminated, metal ions in the serum sample are chelated by matching sodium dodecyl benzene sulphonate and ethylenediaminetetraacetic acid disodium salt, the influence on reaction enzymes is alleviated, and the reagent is a stable, accurate and sensitive detection reagent with high interference resistance.