The invention discloses a division error suppression method of an optical fiber type torsional vibration method measurement process, and belongs to the field of torsional vibration signal processing.On the basis of optical fiber sensor-based pulse timing sequence method, the method can effectively reduce the impact of black-white stripe band division error on the data analysis result. The methodcomprises the following steps: transforming the torsional vibration data into a torsional vibration data matrix; obtaining reference data by extracting average of periodic corresponding points; with the torsional vibration data and the reference data, extracting the torsional vibration characteristic data better reflecting the torsional vibration information; performing high-throughput filtering on the torsional vibration characteristic data, so as to weaken the low-frequency external vibration noise irrelevant to the experiment and increase the signal-to-noise ratio; finally, performing FFT spectral analysis on the filtered torsional vibration characteristic data, to obtain the torsional vibration frequency. The method disclosed by the invention can effectively reduce the influence on thedata analysis result caused by the division error resulting from the tensile deformation of black-white stripe band, failure in accurately connecting the head and tail, etc., thereby widening the application range.