The optical properties of biomedical tissues clearly relate with ingredients, structure and status of human health. Optical Coherence Tomography (OCT) is an imaging technologies with noninvasive property, high resolution and high dynamic range. This technology is of great value for measuring optical parameters of turbid materials, such as tissues. In this thesis, the basic theories of OCT have been researched. The signal of OCT system is simulated by Monte Carlo numerical algorithm. The paper also discusses...