Abstract: Through relative analysis of distributive methods and structure under various economic systems in China, a direct relation between income distribution and economic systems is concluded. In accordance, the author deduces all factors producing income gaps, both reasonable and unreasonable, to be found in the transfer of economic systems. A gradual elimination of such factors, causing the unreasonable expansion of the income distribution gap (in the process of such transfers) is, thus, deduced to narrow the income gap and, contribute to an improved economic system.