This paper first introduces the software maturity concept proposed by FAA. In the condition that the software configuration and compliance status are not frozen before TIA, assessing the software maturity efficiently can provide powerful support and assurance to the engineering approval of the software, as well as reduce the risk of the certification credit flight test to a certain extent and ensure successful flight test activities. Presently, as the software maturity is a new concept, the certification authority (FAA, CAAC) hasn't released the formal and general policies or guidance, and domestic airframer doesn't have any related experience or methods either. This paper proposes some basic consideration factors and analysis points based on the characteristics of the airborne software and on referencing the key points that the certification authority pays special attention to in the software certification.