In order to achieve precise installation verification of key equipment in subsea production system, this paper proposes a full-process solution integrating virtual testing technology and physical simulation. By constructing an integrated software-hardware platform and a virtual testing software system, an integrated functional module covering equipment modeling, scenario setup, physical simulation, and result analysis is developed. Based on engineering demonstration equipment such as subsea Christmas Trees, subsea control modules and connectors, a high-precision virtual testing model library is established. This library incorporates 3D models of subsea Christmas trees, ROVs, hoisting tools and other equipment, endowed with material attributes and physical characteristics to ensure simulation credibility. For subsea hoisting and installation test scenarios, a virtual installation scenario is built combined with the dynamic simulation technology of cable tension to achieve hoisting path planning, installation test verification, and mechanical performance verification. Research results demonstrate that this platform can realistically simulate subsea equipment installation processes while improving testing efficiency and reducing deep-sea operational risks. The 3D Scene library construction methodology and simulation framework provide technical support for promoting the localization of core equipment, demonstrating significant engineering value for deep-sea oil and gas resource development.