Two charge qubits located inside a damped driven cavity is considered. The dynamical evolution of the entanglement between the two qubits is demonstrated analytically or numerically. It is found that with the cavity dissipation, the steady entanglement between the two qubits is sensitive to the initial state of the qubits, but independent of the cavity fields initial state. The two qubits initially in the separable and most mixed state can be more easily entangled. The exteal field can be used to enhance the steady entanglement between the two charge qubits.