Abstract: Blade is twisty and thin-wall part with complicated curved surface. Therefore, blade metrology technology has always been the frontier and hot research topic in the field of manufacturing. The principle and technical characteristics of different measuring methods for blade were analyzed comprehensively. The key technologies for blade measurement were refined, and the general requirements and development direction were summarized, which are high precision, high efficiency, comprehensive information and integrated measurement. Additionally, the technology gap of blade measurement between the domestic and foreign was discussed, and the key technologies and countermeasures were also pointed out. Analysis shows that it is urgent to find a feasible way to solve the blade precision detection through the principle innovation. A novel technical solution for blade measurement based on overall error analysis theory is introduced as well, which can implement comprehensive quality information fast access, quality evaluation and process error analysis for blade, and have a good prospect for development.