The Study on influential factors of tourism is the fundamental work of defining the tourism industry. The complexity of the factors and the blur of the definition find it hard to set foot of the researches in the academic field. Therefore, studies on the domino effect phenomena in tourism and explorations of the influential factors of tourists' demands are becoming the focus of the relative researches. Adopting the Multivariate Time Series Variance Component Model (MTV) which is effective in such research due to the diversity and complexity of the influential factors in tourism demand, this paper concentrates on the influential factors of China's domestic tourism demand, and analyzes the correlative data from 1984 to 2005. the paper holds that the fluctuation of the domestic tourism demand is mainly affected by the increasing speed of economy; the further studies on the development of hospitality and retailing also reflect that the secondary industry pull the domestic tourism demand more effectively than the tertiary industry, while the transport industry doesn't impact too much. The prosperous future of the secondary and tertiary industry in China will surely offer a long-term dynamics for the increase of the tourism demand. Also, the paper points out the roles of investments and the imports and exports, which are the impetus of the economy increase. Then, the paper argues that the higher the living standard is, the more tourists demand, and these demands actually increase with the different degrees and speeds. Finally, this paper puts forward that the increasing speed of the domestic tourism demand is still below the speed of living standard improvement. Thus, the rapid tourism consumption increasing period has not come yet.