The invention discloses a rotation type coal mine optical fiber current sensor comprising a light source, an optical fiber collimator, a polarizing film, an unpolarized beam splitter, a guide opticalcable, a sensing optical fiber, a reflector, a polarization analysis module and a current-carrying conductor. According to the invention, accurate measurement of a to-be-measured current is realized by using the polarization analysis technology; the optical path structure is simple and the error sources are reduced; the light source power fluctuation has no influence on the measurement result; thesensor can be located at the maximum sensitivity working point without depending on a phase modulator and a complex closed-loop control algorithm; and the dynamic measurement range is not limited.