In China's capital market, investors can be divided into two categories: individual investors and institutional investors. Different from foreign capital markets, in China's capital market, individual investors account for a relatively high proportion of investors, China's market is basically dominated by individual investors, retail characteristics are obvious. Due to the short establishment of China's capital market, it is not a completely effective market, the entry threshold is low, the education of investors is not perfect, the investment literacy and investment knowledge accumulation of individual investors is not high enough, and due to the existence of investor cognitive bias, individual investors are often in a weak position in the capital market, and the investment returns of individual investors are often lower than those of institutional investors. Therefore, the research in this paper is aimed at the investment behavior of individual investors. The research includes the influence of individual characteristics of investors on investment decision-making behavior, the effect of Internet media use on urban and rural households' financial investment behavior, the regional heterogeneity of residents' choice of financial assets, the role of risk aversion and subjective well-being on family participation in risk financial markets, and the influence of family age structure, health status, financial experience, financial literacy and trust on household financial asset allocation.