Heavy carrier rockets are important tools for humans to enter space, and future flight based space transportation systems have put forward higher requirements for the cross domain delivery capability of heavy carrier rockets. Based on the open-source data of SpaceX’s Starship rocket, this article simulates the trajectory of future heavy carrier rocket cross domain delivery missions through numerical simulation calculations, analyzes the overall trajectory parameters and time efficiency of cross domain delivery; Propose cross domain delivery modes such as ground delivery and in orbit delivery, and analyze the timeliness and engineering implementation difficulty of each mode by combining heavy carrier rocket testing and launch, ballistic flight, and rapid reusable processes for different modes; Analyze the overall operational cost of cross domain delivery by combining the construction of heavy carrier rocket launch and reuse conditions, transportation supporting conditions, etc.; From the perspective of systems engineering, the constraining factors for the engineering of cross domain delivery of heavy carrier rockets have been proposed. Research has shown that in theory, the cross domain delivery capability of heavy carrier rockets meets the target requirement of “one hour global delivery”, with a delivery capacity of over 100 tons of cargo or over 100 people. However, there are still engineering implementation limitations such as low testing and launch efficiency, large investment in infrastructure construction, and poor transportation convenience.