The objective of the utility model lies in solving problems in the prior art and finding an integrated grounding box for a high-voltage line. The box comprises a box body, a grounding copper bar, an insulated plate, an internal conductor terminal, an external conductor terminal, and a connecting plate which is disposed on the external conductor terminal. The connecting plate is connected with the internal conductor terminal or the grounding copper bar. The box can achieve the switching between a function of direct protection grounding and a function of crossing interconnector grounding through simple steps.