How could China avoid the middle-income trap? There are divergent opinions. In this paper, we would like to slightly adjust the problem statement from abstract to concrete, i.e., way of thinking to solve problem should be: How to avoid the middle-income trap with less detours in the process? The problem itself will be clearer by assuming the biggest risk is from uncertainty of consumption in macro level. Through establishment of an inclusive theoretical framework for domestic consumption enhancement in expenditure structure, the present paper tries to find advantageous factors for gradually stimulating consumption in China. Based on the hypothesis of consumers' instant gratification, which is from Pro. Laibson in Harvard University, investment and consumption are found not completely a tradeoff in statistic in long-run, though a high investment rate is more likely a "double-edged sword" in short-run. Narrowing the gap between the average personal disposable incomes of the urban and rural areas, and ensuring a basic investment rate at least for helping employment of people who have farmer identities more or less, will be more helpful to avoid the potential middle income trap of China, while related investment supervision institution probably including loaning innovation should be seriously established for founding more adequate investment paths besides other institutional innovation. Methods of FMOLS and PC analysis are used in detail for finding these findings.