Abstract: In the socialist market economy, we need to acquire benefit and to avoid harm in facing with capital acts, and to enhance effective management on capital operation according to laws, because of the attributes and its dual function of capital. Firstly, the income gap is unavoidable, and the capital accumulation may produce poor-rich division. At the present stage, the wealth gap obviously supersedes the income gap, this is mainly coming from the disparity of wealth accumulation. Secondly, capital expansion is realized in capital movement. The capital in real economic sphere centered to superior enterprises has an active effect in raising capital efficiency and benefit. Determining by the nature of capital for benefit, the monopolized private-owned enterprises have the impulse for expansion, and the involvement of government official power, the operation of capital market and the Internet platform have provided swift and boundless technical condition for the unordered and limitless expansion of the capital. In order to prevent the subsequent systematic risk, the negative list system is needed to restrict the expansion of monopolized private capital. Thirdly, the capital market is an open place for capital transaction. The maneuvering of capital market cannot do without virtual capital, the negative effect produced by virtual capital of various forms of securities operated on capital market is related to the problems of capital virtualization and the brutal growth of virtual capital. The key for regulating capital acts lies at perfecting and regulating capital market. Capital is omnipotent, while its risk is everywhere. For a better socialist market economy, not only does it needed to regulate the capital itself, but also to regulate the outer environment of unordered capital expansion, such as preventing collusion of power and capital, the anti-monopoly of Internet platform, etc.