In the domestic market,Extracorporeal Membrane Oxygenation(ECMO)has long been monopolized by foreign companies due to patent barriers and first mover advantages.Blood pumps hinder the process of localization as"bottleneck"technology seriously.This article summarizes and analyzes the existing technology of ECMO from the perspective of patents.Based on the analysis of various types of blood pumps,technical decomposition is carried out,and a four-level technical branch of coolant,suspension,material,structure,and coating was proposed.The evolution process of representative technologies was analyzed from five dimensions,and the types,regions,and research priorities of major domestic and foreign competitors were also analyzed.The suggestions have been made on the direction of technological breakthroughs for domestic enterprises to assist in the implementation of key core technology localization.