CMHI163-1/2 semi-submersible lifting dismantling platform, which is the sister of the world’s most advanced semi-submersible lifting living platform, and constructed by China Merchants Heavy Industry, as the main operation platform for the decommissioning and dismantling of the marine jacket platform, integrates the functions such as lifting, living and transportation, and can realize auxiliary functions such as underwater dredging and ROV detection by carrying the third-party equipment. The platform adopts the stroke-side and starboard lower floating body and the stand column adopts asymmetrical and non-cross-brace design, and DP3-level dynamic positioning system, fast ballast system and safety monitoring system are equipped so that the platform has the features of short load adjustment time, wide application in sea areas and high degree of living comfort, to guarantee the smooth operation of the platform. Compared with the “Pioneer Spirit”, the world’s largest semi-submersible heavy lifting living platform, this platform has the same functions, but has more advanced information technology, and is more competitive in construction costs.