The invention discloses an H-shaped multifunctional stabilizer for an air suspension of an underpan of a heavy truck and an arrangement mode. The H-shaped multifunctional stabilizer for the air suspension comprises a main body and four rubber ball hinge assemblies, wherein the main body part of the H-shaped multifunctional stabilizer is in an H shape; the four tail ends of the H-shaped main body are in a cylinder shape; a cylindrical hollow cavity formed through processing is formed inside each cylinder; the four rubber ball hinge assemblies are respectively pressed into the cylinder hollow cavities at the four tails of the H-shaped main body in an interference way; the installing angle of the four rubber ball hinge assemblies can be regulated according to requirements. According to the arrangement mode of the H-shaped multifunctional stabilizer, the two tail ends of the H-shaped multifunctional stabilizer are connected with a bridge case assembly; the other two tail ends are connected with a vehicle frame assembly. The functions of a V-shaped thrust rod and a transverse stabilizing rod in a conventional air suspension structure are integrated, so that the structure is simple; the intensity is high; the arrangement space is reduced; the number of parts is reduced; the installation efficiency is improved; the energy is saved; the emission is reduced; meanwhile, the production and maintenance cost is reduced.