Basing on the branching fractions of J/psi to VP from different experiments, we investigate on the properties of the coupling constants of J/psi to VP decays with a model-dependent approach. We find that the octet coupling constant, g_8, of strong interaction is about twice larger than that of the singlet coupling constant g_1; the electromagnetic breaking parameters g^i_E are larger than the mass breaking parameters g^i_M, moreover, the three parameters of electromagnetic effect are about equal, but the three parameters of mass effect are obviously different and their uncertainties are also large; and the phase angle between strong and electromagnetic interaction is in the range of 70^{circ} sim 80^{circ}. It deepens our understanding of the coupling constant of J/psi to VP decays.
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