Abstract: Deeply promoting and consolidating the achievements of poverty alleviation and effectively linking up with rural revitalization is an important task that China must first complete in promoting agricultural and rural modernization during the "Fourteenth Five-Year Plan" period. Based on the policy review, taking 50 key counties for rural revitalization as samples, we designed the measurement index system of the quality and efficiency of the link from the perspective of consolidation and expansion. In terms of connection quality, it is found that the counties with good connection quality account for 42% of the total, so there is still room for improvement. From the perspective of connection quality, the weak point lies in the industry and talent level. In terms of convergence efficiency: from the perspective of scale efficiency, at least 42 counties have not reached the optimal efficiency state, and can continue to expand the scale of investment. From the perspective of technical efficiency, there is no obvious redundancy in the counties with superior scale, while there is obvious redundancy in the counties with inferior scale. Some counties have "failure at both ends". One is that the existing scale is insufficient, and the input needs to be increased. The other is that there is obvious redundancy, and the input utilization needs to be improved. This indicates that there may be a problem of matching the supply and demand of resources. In addition, the connection quality is high in counties, and the overall efficiency is high. Based on this, this paper proposes the upgrading path of promoting the cascade, complementing the weaknesses, promoting the high-quality connection, activating resources, adjusting the scale, and promoting the efficient connection.