Ultra-large 3D metal printing equipment with flight module

The invention relates to ultra-large 3D metal printing equipment with a flight module. The ultra-large 3D metal printing equipment comprises a forming chamber system module, a forming shaft system module, a powder circulating device, a gas circulating device and a control cabinet set. The forming chamber system module comprises a forming chamber cavity, a horizontal driving module, a flying module and a powder falling module, the flying module is driven by the horizontal driving module to move left and right in the forming chamber cavity to conduct part printing, and the powder falling module is used for supplying powder to the flying module. The mode that the flying module horizontally moves above the forming cylinder for printing is adopted, and the functions of real-time powder laying, printing, smoke dust removal and the like in the ultra-large format area machining process are integrally completed; the designed flight module enables the structure of the forming chamber to be optimized to the minimum, thr