Fireproof highly effective lightning protection box

The utility model discloses a fire proof high efficient lightening protection case comprising a leading-out foot 1, a leading-out foot 8, piezoresistance block 4, a signal external port 5, and a disconnection mechanism TC, all of them are encapsulated in a shell body 2. The disconnection mechanism TC comprises essentially a tensile spring 6, an power fuse link 7, wherein the tensile spring 6 is drawn out beforehand to store elastic potential energy and the power fuse piece 7 can rotate around the fixed supporting point. The signal external port 5 is parallel and electrically connected to the piezoresistance block 4 and traverses the cavity wall of the shell body 2 to connect the external control circuit or remote computer. The utility model has the beneficial effects of high flame-retarding ability, good arc extinguishing effect, safety, reliability, the function of automatic monitored control and is applicable to power supply systems such as 220/380, single-phase, three-phase power lightening protection cases, in particular applicable to forestage lightening protection.