Current intensity is an important parameter of power equipment measurement, monitoring and protection, accurate measurement of the current intensity is the guarantee to the safeness, stableness and reliability of power system and its economic operation. A current sensor for measuring high current was developed, which a Rogowski coil, stacks of piezoelectric ceramic and fiber Bragg grating were combined together. Rogowski coil was used to put high pressure side heavy current into low voltage linearly. The output voltage was added to the stack of piezoelectric ceramic. The combined fiber Bragg grating was telescopic driven by piezoelectric ceramic stack because of the effect of inverse piezoelectric. The linear strain of piezoelectric ceramic stack was converted to the replacement of center reflective wavelength of the optical fiber Bragg grating. Temperature compensation to the fiber Bragg grating was added to eliminate the influence of environment temperature. The measurement of shift of the reflection wavelength of the fiber Bragg grating was used to measure the current. The test results showed that the sensitivity of the current sensor was 0.071 8 pm/A, the nonlinear error was 3.47% FS, the hysteresis was 4.17%FS and the repeatability was 4.17% FS.