The impact of the new strategy on reduction of greenhouse gas (GHG) emissions from ships by the International Maritime Organization (IMO) on the ship retrofitting market has been evaluated and studied. By analyzing the compliance with existing ship regulations and shipbuilding resource endowments at home and abroad, a detailed study is conducted on the impact of the implementation of the new strategy on the size, structure, regional differences, characteristics of the ship retrofitting market and the strategy of shipbuilding and ship repair enterprises. It shows that the implementation of IMO’s new strategy will promote the expansion of the global shipbuilding market based on green transformation, with an expected market size of 4 billion to 40 billion dollars. Additionally, it will drive the ship retrofitting market restructuring toward areas such as hydrodynamics, alternative fuels and post-processing technologies. It also promotes diversification, differentiation and customization in the shipbuilding and ship repair industry, providing data basis for market layout, strategic adjustment and resource allocation in the global shipbuilding and ship repair enterprises.