Absolute cross sections for single-electron transfer of He， Ne， Ar atoms induced by C3+ at low to intermediate velocity (1.7v0—4.2v0) were measured and calculated using n-body classical trajectory Monte Carlo (nCTMC) method. Though good overall agreements are achieved between experimental and nCTMC results, certain differences are found. Because of the existence of polarization and the nCTMC being unable to calculate the multi-electron correlation capture cross sections, the experimental results are greater than those of nCTMC at low velocities(1.7v0—2.0v0). When the velocity of the projectile is higher(2.2v0—4.2v0), the captured electron’s partial screening of the projectile, the electron-electron dynamic correlation and the effective charge are taken into account in interpreting the qualitative differences between theoretical and experimental results. In addition, the cross section rations of transfer ionization to single electron capture are presented and the mechanism of transfer ionization are discussed.