The stability of compressor operation has an inducing and amplifying effect on the stability and performance of the entire engine. Therefore, it is required that the wider the flow margin of the compressor, the better, to adapt to the working stability of the engine under variable operating conditions. This paper attempts to propose a new blade structure with micro pits distributed on the suction surface of the mainstream blade by referring to the "golf ball effect". The flow of a certain type of centrifugal compressor impeller is numerically simulated by using the CFX fluid dynamics software to study the effect of adding micro pits on the performance of flow separation structure and flow margin at different parts of the suction surface of the blade. Study the effect of adding micro pit structures with radii of 0.25-0.3mm at different parts of the blade suction surface on structural performance and flow margin. The research results indicate that adding micro pits at the leading and trailing edges of the mainstream blade suction surface can improve the flow margin. When the radius of the micro pits is 0.3mm, the flow margin effect is the best, increasing by 3.01% and 3.15%, respectively. The use of new structural blades reduces smaller peak efficiency and increases compressor flow margin, providing a reference for the design of centrifugal compressor impellers.