Entanglment properties of photon-added two-mode entangled coherent states are analyzed and analytical expression of the concurrence entanglement is obtained. The results show that the concurrence of the photon-added entangled coherent states is very sensitive to the superposition phase. Schemes for preparation of photon-added coherent states and photon-added two-mode entangled coherent states are also proposed. The preparation procession of the photon-added coherent states is that the photon-added coherent states are firstly tansformed into a superposition state of coherent state and vacuum state (the superposition coefficient is associated with amplitude of the coherent state ), then by applying the interaction of atom inside high-Q cavity with a classical light, finally added coherent states of cavity field is prepared. Preparation of photon-added two-mode entangled coherent states of cavity fields is based on interaction of the flying atom with two cavity fields.