The invention discloses an aluminum alloy cabling rack and an application method. The aluminum alloy cabling rack comprises a first rack body and a second rack body and is characterized in that two sides of the first rack body are connected with two sides of the second rack body through movable connecting rods, the movable connecting rods on two sides are parallelly arranged, two ends of each movable connecting rod are respectively provided with a first ball head structure and a second ball head structure, the first rack body is provided with first ball head seats coordinated with the first ball head structures, the second rack body is provided with second ball head seats coordinated with the second ball head structures; a support rod is arranged between the movable connecting rods on twosides, and cable lap joint units are arranged on the support rod. The aluminum alloy cabling rack has the advantages that the adjusting structure of the aluminum alloy cabling rack is quite flexible,numerous use states can form between the first rack body and the second rack body, extremely high adjustability is achieved, the aluminum alloy cabling rack is especially applicable to special workingconditions, use convenience is increased greatly, on-site frame assembling and welding are not needed, and mounting convenience is increased.