A fuzzy control method for a signal receiving part in a high speed wavelength division multiplexing system, characterized by comprising following steps: A. obtaining related information of each of devices in a receiving system and working environment parameter information of the receiving system, wherein the related information of each of the devices comprises one or more of the following parameter information: model, manufacturer and type, and the working environment parameter information of the receiving system comprises one or more of the following parameter information: optical fiber span range, wavelength information, receiving optical power magnitude, dispersion pre-compensation information and optical fiber type information; B. according to the related information of each of the devices and the working environment parameter information, finding out fuzzy control parameters which best match the related information of each of the devices and the working environment parameter information from a fuzzy control parameter table stored in the system, and controlling parameters of each of the devices in the receiving system according to the found fuzzy control parameters; wherein step B specifically comprises: B1. finding out the fuzzy control parameters which best match the related information of each of the devices and the working environment parameter information from the fuzzy control parameter table, issuing one group of the control parameters out of groups of the found fuzzy control parameters to each of the devices and performing step B2; B2. judging whether quality of signals received by the system is acceptable, if yes, storing configured fuzzy control parameters corresponding to the parameters of each of the devices and environment information, ending flow; or else, selecting another group of control parameters out of the groups of the fuzzy control parameters which match the condition to issue to each of the devices and returning to step B2 to judge continuously. A. obtaining related information of each of devices in a receiving system and working environment parameter information of the receiving system, wherein the related information of each of the devices comprises one or more of the following parameter information: model, manufacturer and type, and the working environment parameter information of the receiving system comprises one or more of the following parameter information: optical fiber span range, wavelength information, receiving optical power magnitude, dispersion pre-compensation information and optical fiber type information; B. according to the related information of each of the devices and the working environment parameter information, finding out fuzzy control parameters which best match the related information of each of the devices and the working environment parameter information from a fuzzy control parameter table stored in the system, and controlling parameters of each of the devices in the receiving system according to the found fuzzy control parameters; B1. finding out the fuzzy control parameters which best match the related information of each of the devices and the working environment parameter information from the fuzzy control parameter table, issuing one group of the control parameters out of groups of the found fuzzy control parameters to each of the devices and performing step B2; B2. judging whether quality of signals received by the system is acceptable, if yes, storing configured fuzzy control parameters corresponding to the parameters of each of the devices and environment information, ending flow; or else, selecting another group of control parameters out of the groups of the fuzzy control parameters which match the condition to issue to each of the devices and returning to step B2 to judge continuously.