A novel method for measuring electrodeposition stress was presented.Its mechanism is that the center wavelength of metal coated Fiber Bragg Grating sensor shifts under the action of the electrodeposition stress when the FBG is used as cathode in electrodeposition;based on the shift,the stress can be calculated.In the measurement,the center wavelength shifts of the FBG during deposition are recorded by FBG interrogator and these records are divided into many time segments with equal interval.Based on average depositing velocity and the relationship of FBG′s stress sensitivities with deposition thickness, the stresses producing in every time segment are calculated individually.Stress evolution is obtained by adding up these segmental stresses.The process is stress evolution during electroplating nickel was tested by using electroless Ni-P coated FBG sensor.The result shown that the FBG′s sensitivity is higher than 7pm/MPa under the condition that the nickle thickness is less than 50μm,and the degree of accuracy is more than 0.14 MPa.After deposition for 6 000 s,the accumulative pressure stress is 173.049 9 MPa.