The invention discloses a spectrum detection method and device based on a spiral microchannel
flow cell. The method comprises the following steps: collecting a sample fluid, carrying out multi-inlet spiral channel mixing strengthening treatment to generate a mixing strengthening characteristic, and generating
mass transfer efficiency distribution based on the mixing strengthening characteristic; determining a key
mass transfer enhanced area through
mass transfer efficiency distribution, and extracting
concentration gradient distribution characteristics to determine an in-situ detection sensitive area; carrying out multi-parameter detection on the in-situ detection sensitive area and fusing to determine an effective acquisition interval to obtain original
spectral data; determining a response precision threshold value based on the effective acquisition interval and the mixed strengthening characteristics, and performing flow state stability evaluation on the key
mass transfer strengthening region to form a flow state
stability index to construct partition monitoring configuration; and identifying an abnormal
response area to generate a flow state correction coefficient, and correcting the original spectrum data to generate a spectrum detection result, thereby realizing self-adaptive spectrum detection in the spiral micro-channel.