In the construction process of large oil and gas field ground projects, it is easy to be influenced and troubled by various subjective and objective factors. If the traditional engineering construction mode is adopted, it will bring great challenges to the successful implementation of the project. It is imperative to find a more suitable construction solution. Modular construction technology is currently one of the most advanced engineering construction technologies in the world. However, in the process of implementing the modular design of engineering, we also need to implement the key technologies of ground engineering construction including the 3D design technology of the module, the patented integration technology of the modular device, the general layout technology of the module, the evaluation and design technology of module safety and stability, the module division design technology, the optimum design technology of steel structure and foundation, the module operation and maintenance design technology, the module packaging and protection design technology, the transportation and handling design technology and module separation and reloading design technology. Only through the effective combination of these technologies can the project be carried out smoothly.