Abstract: There are approximately three conformation states of molecular segment, namely trans T, gauch G⁺, gauch G^-. The conformation of segmer is determined by distribution of these states just like three component copolymer. We assign three kinds of distribution as following.By exact calculation the conformation for odd number of T-segment between two Gstates is different from that for even number, so we get six conformation of segmer. If we fix one end of segmer on same point, then these segmers walk to six nearly perpendicular direction in three dimension scale. In view of the above result, we propose some concept for amorphous structure of polymer.