The utility model discloses a density relay secondary cable core gui ji device, its characterized in that is equipped with the cross -section and is square strip base member, and the strip base member is divided into seven units along length direction, and every unit of terminal surface evenly is equipped with three heart yearn binding post before the strip base member, and every unit of strip base member rear end face is equipped with a binding post, and three heart yearn binding post is linked together with binding post after the switch of strip base member up end is parallelly connected, has following advantage: firstly, effectual two drawbacks of pressing of terminal row sinle silk of having avoided have avoided connecing the problem that the signal transfer that leads to did not go out because of the cable is virtual, secondly, it needs the loaded down with trivial details degree of dismouting plug box to have simplified the check -up of density relay greatly, thirdly, imitate and reduced the density relay and install the short circuit risk that exists additional in put into operation back and the density relay check -up working process.