The invention discloses a manufacturing method for a 1600T mast suspension arm frame. The 1600T mast suspension arm frame is manufactured through the steps of assembling of the arm frame root, assembling of the arm frame middle, assembling of the arm frame head and final assembling of the arm frame. The manufacturing method for the 1600T mast suspension arm frame has the advantages that in order to shorten the construction period and guarantee the welding quality, the 1600T mast suspension arm frame is divided into the three parts of the arm frame root, the arm frame middle and the arm frame head to be assembled, and final assembling is conducted after assembling; and the length of the arm frame is large, a main truss of the arm frame is of a box structure and internally provided with a partition plate, so that group prefabricating is conducted through a sectioned group mode, an oblique jig frame is used for automatic submerged arc welding of group fillet welds on site, and in this way, nearly half of the construction period of the arm frame is shortened.