The utility model discloses a vapour vehicle suspension crossbeam structure has the main part, it is low in the middle of the main part is, the high saddle structure in both ends, wherein, the main part is connected gradually by entablature, center support and bottom end rail to be constituteed, the width value of entablature is greater than the thickness value, the width value of bottom end rail is greater than the thickness value, center support's width value is less than the thickness value, main part mid portion on the entablature, set up the gasbag mount pad, with both ends coupling part in the middle of the main part on the entablature, set up the bumper shock absorber installing support. The utility model discloses a vapour vehicle suspension crossbeam structure, the main part is horse saddle -type, and the tensile can the reinforce, connects the fastening, is out of shape for a short time, and the tensile can the reinforce, total convenient assembling, the lubricating oil that need not regularly to annotate is nursed.