Optical fiber insert core assembly directionality precise detecting device

The utility model relates to the product performance testing technical field and an optical fiber insert core assembly directionality precise detecting device. The optical fiber insert core assembly directionality precise detecting device is provided with a base. The optical fiber insert core assembly directionality precise detecting device is characterized in that a three-dimensional adjusting rack and an insert core assembly fixing seat are installed at the left side and the right side of the base; the top of the three-dimensional adjusting rack is provided with an electrode holder; the electrode holder is provided with a laser; the head of the laser is opposite to the insert core assembly fixing seat; an assembly hole which directly faces the laser is formed in a support plate of the insert core assembly fixing seat; the support plate is provided with a direction fixing ring which is located at the rear side of the assembly hole; the inner round surface of the direction fixing ring is provided with two sym