Box-type nodular cast iron high-integrity container

The invention belongs to the technical field of radioactive waste management, and particularly relates to a box-type nodular cast iron high-integrity container and a radioactive waste filling method thereof. The protection cage guide boss is located at the inner bottom of the box body, the box body bottom arc-shaped groove is located at the outer bottom of the box body, the outer edge of the box body flange is symmetrically provided with two positioning pins, the inner edge and the outer edge of the box body flange are provided with an inner-layer O-shaped sealing ring and an outer-layer O-shaped sealing ring, and sixteen box body bolt holes are evenly distributed along the outer layers of the O-shaped The hollowed-out top cover arc-shaped boss with the drainage groove is located on the front face of the top cover, the circular grabbing opening is located in the top cover arc-shaped boss, 16 through top cover bolt holes are evenly distributed in the edge of the top cover, and the two positioning holes are sym