Abstract: In this paper,according to the results of CNDO/2 quantum chemistry calculation, we have discussed the possibility on a set of novel conjugated shown that, hydrocarbons, ladder-like polymers of polycyclic conjugated hydrocabons. It is when n is a even number the molecules of chain ladder-like polymers of polycyclic conjugated hydrocabons with three menbered ring-five menbered ring or four menbered ring-four menbered ring as repeated unit, H₂-(-C₃C₅H₂) or H₂-(-C₄HC₄H-)-_nH₂, might be stable, which enables us to believe that the aformentioned molecules are possible potential synthesized objects.