Introduction  The transmission line load which applied on tower become lager and lager. In order to bearing the reaction, the flexible tower base plate with eight anchor bolts which used to connect the tower leg and foundation had been adopted commonly. But there isn′t any method to design this member in relative specification, so it is necessary to study the bearing capacity of base plate.

  Method  This paper analyzed the bearing capacity by classical mechanics theory, finite element and full size experiment.

  Result  Studies have shown that the stress of the base plate is unevenly distributed under tension force.

  Conclusion  A new formula has been proposed. This formula has the reference value when design in project.