With the development of industrialization, more and more measurement equipment is applied in Ophthalmology. Before many ophthalmic operations, various biological parameters of anterior segment are usually measured precisely. The common biological parameters affecting the refractive power of human eyes include axial length, corneal refractive power, anterior chamber depth etc.This paper summarized the principle of optical coherence interference technology equipment on the market;and analyze the measurement of the key biological parameters of anterior segment.It aim to provide the reference for ophthalmic clinical research and technical evaluation of medical devices.