Abstract:Exploring the competitive relationship among the participators of crowdsourcing contests is conducive to understand the organization and innovation mode of crowdsourcing participators and improve the innovation efficiency of crowdsourcing contests. On the basis of the social network and random statistical theory, the influencing factors of network evolution are divided into three dimensions: attributes of network structure, attributes of network node and attributes of relationships. The competition network is constructed based on the data of zhubajie.com, a typical crowdsourcing platform. The evolution characteristics of participators competition network are analyzed, and the driving mechanism of network evolution is explored by using exponential random graph model (ERGM). The results show that the competition network presents the characteristics of "high density, short path", the characteristics of small world are obvious, and the structure of competitive network tends to be stable; The participators' transaction amount, competitive intensity and structural hole attribute contribute to the formation and evolution of network; Knowledge proximity and organizational proximity play a significant role in the formation of competition networks, while economic distance negatively affects the formation of competition networks.