Signal processing method and device

The embodiment of the invention discloses a signal processing method and device, relates to the technical field of communication, and can prevent the inter-symbol interference resistance of a transmitting end of a transceiver from being reduced. The method includes receiving a target signal from an optical crossover device. And determining a receiving end parameter according to the target signal. And determining a sending end parameter according to the receiving end parameter. Wherein the transmitting end and the receiving end of the target signal are the same transceiver, and the parameters of the receiving end comprise at least one of an equalizer parameter, an error rate, a link impact response or a nonlinear damage index of the receiving end; the parameters of the sending end comprise at least one of an equalizer parameter, a level interval dislocation degree, a nonlinear compensation coefficient, a nonlinear function or a signal modulation format of the sending end.