A target-type fiber Bragg grating(FBG) flow velocity sensor based on equal-strength cantilever has been designed.The force which has corresponding relationship with velocity is induced by the fluid on the target,and then the lever is adopted to transform the force into the Bragg wavelength shift.A couple of fiber Bragg gratings(FBGs) are separately mounted at either side of the cantilever to solve the cross-sensitivity between temperature and strain.The precise relationship between velocity and variation magnitude of FBG central wavelength is established.Moreover,the pipeline flow field is simulated by fluid analysis software FLUENT.Simulation results show that the sensitivity coefficient is 2.54×10-3s2/m2 when the pipeline inner diameter is 0.7 time of target disc diameter.The pipeline calibration experiments have been carried out and the results indicate that the velocity resolution of the proposed sensor is 0.02 m/s and the maximum full scale error is 1.5% FS in measuring range of 0-1.40 m/s.