Blockchain technology is an important cornerstone of the future intelligent revolution. With the increase of the number of blockchain platforms, users will face problems such as information uncertainty and difficulty in selecting various standards. There are few researches on the evaluation of blockchain platform in China, so it is of great significance to comprehensively evaluate it. In order to measure the performance of blockchain platforms, based on the comparative empirical research among existing blockchain platforms, the evaluation indexes that affect the applicability of blockchain platforms are selected. Considering the complex factors of the index system and many qualitative indicators, the fuzzy analytic hierarchy process (FAHP) was selected to establish the applicability evaluation index system of blockchain platform based on the FAHP method. The application of Ethereum and Hyperledger Fabric in the field of architecture is selected as an example for model calculation. Through the comparative analysis of the calculation results of the example and the actual application of the current blockchain platform, and put forward suggestions on the comprehensive evaluation of the current blockchain platform, which has reference significance for the establishment of the evaluation index of the blockchain platform, and has guiding significance for professionals in the construction industry to choose the appropriate blockchain platform.