Aiming the importance degree of indexing terms hadn't distinguish to users and the common computing platform carrying capacity limited proposed the improved cosine vector measuring method indexing term weight algorithm based on cloud computing (ICVMMITWCC algorithm), the algorithm corrected the classic cosine vector measuring method indexing term weight algorithm (CCVMMITW algorithm) to acquire relative weight by computing indexing term average weight from texts set that included all indexing terms; comparing the efficiency of sorting of texts in ICVMMITWCC algorithm and CCVMMITW algorithm by experiment, indicating ICVMMITWCC algorithm is closer to the query requirement of users.