The invention relates to an automobile wind tunnel test system for matching with moving belt ground effect, which is a structure of a simple model supporting and force measuring device suitable for abroad band moving belt ground effect simulation system, in particular to a wind tunnel equipment layout scheme of a simple wind tunnel balance, a broad band type moving floor board and a wind tunnel model or real automobile support, which guides and completes the design, the manufacture and the installation of wind tunnel equipment using the automobile wind tunnel test system and can complete an automobile wind tunnel test under the condition. The automobile wind tunnel test system lays out the moving belt ground effect simulation system (1) and the wind tunnel balance (3) on the lower part ofthe wind tunnel test section of an automobile, wherein the moving belt ground effect simulation system (1) is arranged below the tested automobile (4), and the wind tunnel balance (3) is connected with the tested automobile (4) through an automobile body supporting device (2).