The utility model provides an outdoor high -voltage ceramic post insulators bottom, it includes the ring bodies, ring bodies side is equipped with 2 at least cylindricality fixed blocks, is equipped with the jack in the lug, is equipped with the internal thread in the jack, and first spacing piece and the jack connection of the spacing piece of second in the tip passes through bolt and lug are the lid in the bottom of ring bodies, and fixed mounting has expanding spring on the lid. The utility model discloses can solve the fusible core of current fuse and install fixed unstable problem in the ceramic pipe.