The invention discloses a full-range C-reactive protein detection kit. The content of C-reactive protein in a sample is detected by an immune transmission turbidimetry method, so that the aim of quantitative detection is fulfilled. The kit comprises a reagent R1 and a reagent R2, wherein the reagent R1 is a phosphate buffer solution; and the reagent R2 is a conjugate formed by crosslinking latex with two particle sizes and two anti-human C-reactive protein antibodies respectively. Meanwhile, the kit is combined with a full-automatic biochemical analyzer for use, so that the detection sensitivity and accuracy are improved, and the detection time is shortened. The full-range C-reactive protein detection kit can be used for measuring the content of high-concentration CRP (C reactive protein)and the content of low-concentration CRP, has high sensitivity, high stability, wide linear range, high repeatability, high interference resistance, high accuracy and high precision, and can meet theclinical examination requirement.