The invention discloses a 400-tonnage tilting suspension girder comprising a suspension girder body, a baffle, a suspending wheel, check blocks, pallets, supporting plates, lugs and a long shaft, wherein the suspension girder body is in a box girder structure, is eudipleural by taking a center line as a reference and is in a portal shape; the central area of the suspension girder body is ladder-shaped, the widths of the two ends of the suspension girder body are more than that of the middle part of the suspension girder body, and the two ends of the suspension girder body are provided with installation holes; two tips of the suspension girder body are respectively connected with two groove-shaped supporting plates; one pallet is arranged at the bottom of the lower end of the each supporting plate; one check block is arranged on each pallet; and two lugs are symmetrically welded on the two sides of the suspension girder body in the width direction, and two lugs are symmetrically weldedon the two ends of the suspension girder body respectively in the length direction, namely on the outer sides of the supporting plates. In the invention, a double-end screw is used for connecting a suspension girder and a revolution body workpiece into a whole, thus effectively controlling the gravity shift of the revolution body workpiece in a suspension process, solving the problem of tilting in the suspension process and realizing fixed point placement.