Abstract:To solve the problem of spacecraft-spacecraft information flow validation, this paper presents three-step strategy. Firstly, referring to viewpoints and analyzing methods correlated in information flow design standard files, we describe all the properties of the information flows; Secondly, from the angle of test validation, we bring forward the extending method of the information flow description; Lastly, we use software test design theories to achieve test cases, based on which we accomplish the spacecraft-spacecraft information flow test validation. This method has been used in some spacecraft’s test design period, and it guarantees the test entirety and improves the rationality and validity of the test case designed, which is proved a effective information flow strategy.