The invention belongs to the sensor technical field and relates to an optical fiber direction sensor for partial discharge detection of high-voltage electrical equipment. The optical fiber direction sensor includes an optical fiber magnetic field sensor and an optical electric field sensor; the optical fiber magnetic field sensor includes a first single-mode optical fiber, a first polarizer, an optical fiber sensing ring, a first analyzer and a first photoelectric detector which are connected with one another sequentially; the optical electric field sensor includes a second single-mode fiber, a first collimating lens, a second polarizer, a quarter-wave plate, an electro-optical crystal, a second analyzer, a second collimating lens and a second photoelectric detector which are connected with one another sequentially; the first single-mode optical fiber and the second single-mode optical fiber are both connected with a light source; the first photoelectric detector and the second photoelectric detector are both connected with a signal processing unit; and the signal processing unit judges the transmission direction of pulse signals through the polarity of the magnetic field and electric field of the pulse signals detected by the optical fiber magnetic field sensor and the optical electric field sensor.