Compared with previous research, this paper, builds a multi-homing model for multi-homing users using new software platforms under free decision-making conditions, analyzes the relationship among the scale, pricing and profits of platform and users on both two sides at equilibrium. It’s concluded that the total number of multi-homing users is in positive correlation with profits and users on both sides grow asynchronously and the platform needs to restrain multi-homing behavior of users.