The embodiment of the invention provides a quantitative identification method for a pressure pulsation broadband frequency of a centrifugal pump, which comprises the following steps: recording the transient pressure of the centrifugal pump, obtaining the frequency domain data of a pressure coefficient, and extracting each broadband frequency in the frequency domain data; for each broadband frequency, fitting all maximum points of the broadband frequency by adopting a normal distribution form on the basis of a screen iteration method to obtain the center frequency of a first fitting function; calculating a deviation degree according to the center frequency and the peak frequency, and determining a distribution form type corresponding to each broadband frequency according to the deviation degree; and fitting each broadband frequency by adopting a fitting method corresponding to the distribution form type to obtain a target fitting function corresponding to each broadband frequency, and obtaining a form quantitative characterization parameter of the broadband frequency based on the target fitting function. According to the embodiment of the invention, the centrifugal pump pressure pulsation broadband frequency is quantitatively identified through the morphological quantitative characterization parameters, so that a complete quantitative evaluation system of the centrifugal pump pressure pulsation frequency characteristic can be established.