In order to eliminate the influence of the temperature in current measurement,a fiber Bragg grating (FBG) al ternative cu rrent transformer with temperature compensation is proposed.Two FBGs and the gia nt magnetostrictive material (GMM) which is composed of sensing unit are placed in t wo adjacent and symmetrical ferromagnetic circuits,respectively.The ferromagnetic circuits are loaded with t wo opposite direct current bias magnetic fields.We realize the demodulation of two fiber FBGs and the measuremen t of alternative current by using matching detection.Finally,it is suggested that with the influence of temperature,the static working point of the system is almost unchanged,and in the linear region,the maximum measured current is 93.78A with 1.68% full scale accuracy.This kind of FBG current sensor can not only measure alternative curren t but also realize direct current measurement.