The utility model discloses eccentric floor basis of straight post of special high -tension transmission shaft tower, it includes principal post (1), is located pre -buried oblique male angle steel or rag bolt (4) of principal post (1), and angle steel or rag bolt (4) are connected with the iron tower, and square foundation bottom plate (3) that are connected with principal post (1) have been arranged between square foundation bottom plate (3) and principal post (1) floor (2), and principal post (1) off -centre arranges, principal post (1) be square cross -section reinforced concrete column, principal post (1) erroneous tendency shaft tower central point puts 45 degrees directions and places, is square foundation floor width B's 16 got apart from e to principal post off -centre 1 8. This novel basis can effectively be improved basement additional stress on the one hand and distributed, reduces footing base, on the other hand improves the transmission of bottom plate internal stress, reduces basic square foundation bottom plate thickness.