In recent years, advances in density matrix renormalization group (DMRG) have already enabled larger active spaces to compute entangled many-electron wavefunctions in condensed matter physics. Applications of DMRG method have won success in several complicated chemical and biochemical systems where DFT cannot well describe the electronic structure. Although cyclo-[2n]-carbon could be dealt with DFT in previous related work properly, considering its large-scale conjugated systems with strong electron correlation, DMRG is believed to be much more reliable and more information can further be obtained. Therefore, in this work, we will construct explicit chemical images for cyclo-[2n]-carbon molecules and compare the results obtained for n = 3 ~ 9 under DFT and DMRG(4n, 4n) calculations, to explore the chemistry of cyclo-[2n]-carbon with easy languages.