The load of an industrial enterprise power grid is characterized by a high proportion of induction motors and low power factor. When the only connection channel with the main network fails and disconnects, the risk of instability is prominent, posing a serious challenge to emergency control. First, the characteristics of industrial enterprise power grids are elaborated from the perspectives of grid structure, load, and technician requirements. Based on the selected load simulation model, the voltage frequency coupling characteristics of the grid in short-circuit faults and the adaptability of traditional emergency control measures are analyzed. Second, in response to the emergency control needs of avoiding transient undervoltage over frequency and steady-state overvoltage under frequency after faults, a response strategy considering parallel actions of equipment protection and system protection, as well as electrical response driven is studied. Then, a two-stage emergency control method for such grids is proposed. Finally, the feasibility and effectiveness of the proposed method are verified based on an actual industrial enterprise power grid, indicating that optimizing the control timing can deal with the contradiction between rapid recovery of transient undervoltage and steady-state overvoltage.