Evaluating the operation of enterprise safety standardization scientifically and accurately is of great significance not only for government supervise, but also for enterprises knowning about production safety of itself. In this article, OHSMS and Safety Standardization are integrated in the establishment of evaluation index system which is applied to geological prospecting units safety standardization, CMM theory is used in grade classification, and evaluation model is established based on blind numer theory. The case study shows that this model is closed to practical production of geological prospecting units and has strong adaptability and simple operation，and the result can be easily analysed and applied for policy-makers and has instructive significance in reality.