[en] The mixing of scalar mesons is an open problem, since the structure of scalar meson is unclear and controversial "["1"]. Now we will apply the idea of the mixing of scalar mesons to baryon-baryon system "["2"-"6"]. By introducing the mixing of scalar mesons "["7","8"], we dynamically investigate the structure of possible nonstrange dibaryons in the chiral SU(3) quark model "["9"] by solving the resonating group method (RGM) equation. The model parameters are taken from our previous work, which gave a good description of the energies of the baryon ground states, the binding energy of deuteron, and the experimental data of the nucleon-nucleon scattering processes. The results are analyzed and compared with no mixing, ideal mixing and general mixing, and we find the contributions from σ and ε mesons are different. (authors)