The invention relates to the technical field of ship engineering and provides a method for producing a twisted T profile for a ship body T profile transverse-longitudinal combination connection structure. The twisted T profile is a transverse T profile which is connected between two longitudinal combined T profiles in the ship body T profile transverse-longitudinal combination connection structure. According to the method for producing the twisted T profile, the principle of three views for projection is utilized, and actual figure expansion of a transverse T profile panel is achieved; processing data are marked on an expanded actual figure, and processing is conducted on the transverse T profile panel through a processing template, so that processing of the transverse T profile panel is simplified. When the twisted T profile is mounted, firstly, twisting processing is conducted on the transverse T profile panel till the twisted shape required for mounting is obtained, and then panels of the T profile which is longitudinally and transversely connected in a combined manner are connected. By means of the method for producing the twisted T profile for the ship body T profile transverse-longitudinal combination connection structure, secondary cutting conducted on the T profile when the longitudinal-transverse combination T profile is mounted at site is avoided; manpower and material resources are saved; and connection strength, mounting precision and appearance attractiveness are greatly improved.