The invention relates to a neuron-specific enolase stabilizer. The stabilizer is prepared from a Tris.HCl buffer solution, NaCl, sucrose, trehalose, casein, bovine serum albumin, PEG6000, lysine, disodium ethylene diamine tetraacetate, dithiothreitol, glycerin, Tween-20, Triton X-100, aprotinin with the final concentration of 100-300 KIU/mL, and Proclin 300, and above substances are uniformly mixed in Millipore ultrapure water used as a solvent, is filtered by a 0.22 [mu]m filter membrane, and finally is preserved at 0-10 DEG C. The stabilizer greatly improves the preservation stability of neuron-specific enolase, prolongs the shelf life of a kit, simplification of the production technology and the doctor's detection operation process of a neuron-specific enolase detection kit, improvement of the metamorphism resistance in the preparation, transportation and storage process of the neuron-specific enolase, and reduction of inter-assay variation caused by a freeze-drying technology.