In order to figure out the localizations of the five localized modes around the soliton in polyacetylene, the dependences of their configurations on the length of the chain have been studied in both the open chain and the close ring cases. For the open chain, it is found that the localized mode g4 has some different behavior from the localized modes g1, g2, g3 and g5, namely, when the length of chain is increasing, the configurations of g1, g2, g3 and g5 do not change, whereas the wings of g4 become broader, this means that the localization of g4 is not so complete as the other localized modes.
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