The utility model relates to an indoor type high tension cable cross -bonding grounding box with exempt from to open detection function. Including box, case lid, be equipped with cross -bonding conducting structure in the box, the top is equipped with cable sheath protector in the box, and the bottom half is equipped with the insulation board, and the box both sides still are equipped with the ground terminal who passes the box tank wall and link to each other with the earth earthing terminal, in cross -bonding conducting structure first in electric aluminum row, the second electric aluminum row, first U -shaped electric aluminum arrange and be connected, in the third in electric aluminum row, fourth electric aluminum row, the and U -shaped electric aluminum arranges and is connected, viscera electric aluminum row, electric aluminum row, third U -shaped electric aluminum arrange and are connected in the 6th. The utility model discloses utilize special cross -bonding conducting structure electrical connection (switching) design, can be in order to avoid unpack and realize high tension cable's sheath current detection, partial discharge detector etc. Higher practical value is had in the high tension cable operation, in safeguarding.