Inductive control is one of important methods of urban traffic signal control. It is suitable for the control of traffic flow with larger fluctuation. In order to overcome the drawbacks of classical inductive control, the formulas of the primary parameters in inductive control are given, impact of phase sequence on inductive control is analyzed, and then a multi-phase inductive control algorithm with dynamic phase sequence is proposed in this paper. The simulations show that the proposed algorithm has lower average delay than classical inductive control. It is easy to implemented and practical.