Near infrared spectrum signal denoising method and device, terminal equipment and storage medium

The invention provides a near infrared spectrum signal denoising method and device, terminal equipment and a storage medium. The near infrared spectrum signal denoising method comprises the following steps: acquiring a near infrared spectrum signal from a receiver of a central venous pressure sensor; performing empirical mode decomposition on the near infrared spectrum signal to obtain an intrinsic mode function component and a margin of the near infrared spectrum signal; wherein in the process of performing empirical mode decomposition on the near infrared spectrum signal, a corresponding spline interpolation function is selected according to the frequency of the signal to be decomposed to perform envelope fitting; and filtering the intrinsic mode function component, and reconstructing the filtered intrinsic mode function component and the margin to obtain a denoised near infrared spectrum signal. When empirical mode decomposition is carried out, the intrinsic mode function component in the near infrared spe