Einstein-Podolsky-Rosen (EPR) entangled state is an essential resource in quantum information and quantum computation. With the deep development of research, bipartite entangled states of light with high entangled degree should be obtained firstly to complete quantum information processing efficiently. It has been proved an effective method to improve the quality of entangled light field by manipulation of entangled states of light. Coherent feedback control has been proved to enhance the squeezed degree of the squeezed state light field because of bring no additional noise to the optical parametric system. We theoretically calculate the relationship between the quantum correlation noise of the EPR entangled state generated from coherent feedback control non-degenerate optical parametric amplifier and various parameters of the total system, and the influence of these parameters on the entanglement enhancement is also analyzed detailedly. This provides references for further research on the EPR entangled state with higher entangled degree.