With the rise of the global digital economy，Internet platforms have begun to play an increasing role in social and economic life，some of which have gained a dominant position in their respective market areas，forming an oligopoly. Looking at the root of causes，these monopolies are not only due to the subadditivity of the cost of Internet platforms，but also because of network effects，multilateral market effects，and specific behavior patterns. These oligopolies are embodied in data monopoly，netflow monopoly and algorithm monopoly，which bring about the implications as per anti-competition，digital distortion，and self-reinforcing monopoly on the market. Taking into account of international experience in the governance of Internet platform oligopoly，this paper proposes measures such as behavior dynamic supervision，institutional and legal integration，elimination of leverage effect，and platform neutrality pilots to regulate Internet platform oligopoly.