Hollow I-shaped steel with high structural strength

The utility model relates to the technical field of I-shaped steel, and discloses a hollow I-shaped steel with high structural strength, which comprises an I-shaped steel main body and an I-shaped cavity positioned in the I-shaped steel main body, and the center position of the I-shaped cavity is fixedly connected with a first I-shaped steel plate matched with the I-shaped cavity in size. A first I-shaped steel plate matched with the I-shaped cavity in size is fixedly connected to the center of the I-shaped cavity, and a second I-shaped steel plate and a third I-shaped steel plate matched with the I-shaped cavity in size are arranged on the two sides of the I-shaped cavity respectively. The second I-shaped steel plate and the third I-shaped steel plate which are matched with the I-shaped cavity in size are arranged on the two sides of the I-shaped cavity respectively, a small number of steel plates are added, the weight cannot be increased greatly, the hollow I-shaped steel body is supported, the strength of