The bridge bearing beam is a special equipment or transporting large and undetachable super high goods, such as large transformer, which is usually used together with hydraulic full-trailer. The equipment is composed of load-bearing beam, adaptive steering mechanism, supporting end cross beam, composite module load-bearing beam which can be spread transversally, transverse support bar system, hanging device and etc. The goods can fixed in the middile of the two load-bearing beams by means of shoulder frame, hanging bottom and special way of binding. In this way, the goods can be transported just above the ground surface.