The utility model relates to a section transfer joint structure of a steel structural circular tubular column and a cross column and belongs to the technical field of building steel structures. The section transfer joint structure comprises the cross column (2), a box-type column (3), a square-top and round-bottom taper pipe (4) and the circular pipe column (1) which are arranged in sequence from top to bottom. The size of the appearance of the box-type column (3) is in accordance with that of the cross column (2). The size of the appearance of the round end of the square-top and round-bottom taper pipe (4) is in accordance with that of the circular pipe column (1), and the size of the appearance of the square end of the round-top and square-bottom taper pipe (4) is in accordance with that of the box-type column (3). The plate thickness of the box-type column (3) and the square-top and round-bottom taper pipe (4) is according to a thicker one between the wall thickness of the circular pipe column (1) and the plate thickness of the flange of the cross column (2). A ventral plate of the cross column (2) extends into the box-type column (3) and the round-top and square-bottom taper pipe (4), and increases section height of the cross column (2) by 200 millimeters. The flange of the cross column (2) is in arc-transition with the column wall of the box-type column (3), and the gradient of the round-top and square-bottom taper pipe (4) is not larger than 1:6. The section shit joint structure has the advantages of simple and explicit force transmitting of a connection joint, safety, reliability, simple processing, and good appearance visual effect.