The relative partial cross sections for13C6+-Ar collisions at 4.15-11.08keV/u incident energy are measured.The cross-section ratiosσ2E/σsc,σ3E/σsc,σ4E/σsc and σ5E/σsc are approximately the constants of 0.514±0.05,0.20±O.03,O.06±O.03 and 0.02±0.01 in this region.The significance of the multi-electron process in highly charged ions(HCIs) with argon collisions is demonstrated(σME/σSC as high as 0.79±0.06).In multi-electron processes,it is shown that transfer ionization is dominant while pure electron capture is weak and negligible.For all reaction channels,the cross-sections are independent of the incident energy in the present energy region,which is in agreement with the static characteristic of classic models,i.e.the molecular Coulomb over-the-barrier model (MCBM),the extended classical over-the-barrier model(ECBM)and the semiempirical scaling laws(SL).The result is compared with these classical models and with our previous work of13C6+-Ne collisions[Chin.Phvs.Lett.23(2006)95].