Linear transformation gain method of water pollution tracing three-dimensional fluorescent digital signal

The invention discloses a linear transformation gain method of a water pollution tracing three-dimensional fluorescent digital signal, which comprises the following steps of scanning a polluted water sample by using a three-dimensional fluorescence spectrophotometer to obtain three-dimensional fluorescence spectrum matrix data, performing visualization processing on the matrix data to obtain a thermodynamic diagram, visually eliminating Raman scattering and/or Rayleigh scattering areas in the thermodynamic diagram to obtain a water sample thermodynamic diagram, normalizing the maximum value and the minimum value of the fluorescence intensity fi in the thermodynamic diagram of the water sample into 1.0 and 0, and then calculating the residual fluorescence intensity value FI(x, m) by using linear interpolation, and reconstructing a matrix from the gained fluorescence intensity data. Aiming at the poor Raman and Rayleigh scattering automatic elimination effect in three-dimensional fluorescence spectrum matrix da