Abstract: The Independent Component Analysis（ICA） is introduced in order to increase the Signal Noise Ratio（SNR） of Dynamic Spectrum（DS） which is a revolutionary method for blood component measuring.The neg-entrophy theory is introduced，serial of steps which are used in the data processing based on it are designed，and the corresponding experiments and discussion are done to test the method.Results show that through the ICA method，the noise can be decreased using less samples.Compared with the conventional superposition method，the ICA may increase the wavelength-resolution while the SNR increases which grantees the consequent processing of DS data.