Abstract: This paper addresses the challenges associated with conducting accelerated storage life tests and evaluations for assembly missile equipment that exhibits multiple failure modes and mechanisms, particularly under the constraint of small missile sample size. A novel method for modeling the accelerated storage life test of such equipment was proposed. The method involved establishing a storage life model based on competitive failures and incorporated the storage life information of individual components. An integrated approach for dermining the acceleration factor of assembly missile equipment was developed. Furthermore, a method for evaluating the storage reliability of assembly missile equipment with small sample sizes was introduced, utilizing a test length factor to validate high storage reliability by prolonging the test duration. The effectiveness of the proposed method was demonstrated through a case study of a servo mechanism acceleration test. This research offers an innovotive technical approach for carrying out accelerated storage life tests and evaluations on assembly missile equipment when sample sizes are limited.