The invention discloses a transaction power distribution method and device based on multi-level section control. The method comprises the steps of obtaining the transaction power of each station undereach layered section at a current moment, and calculating the accumulated total transaction power of the layered sections; calculating a new target output of each layered section according to the accumulated total transaction power of the layered sections; distributing the new target processing of each section to all stations under the corresponding section in proportion to obtain a power distribution target value of each station under each section; and calculating a transaction power instruction value of the corresponding station for each station according to a distribution strategy of thetransaction power. According to the method, the smooth execution of a transaction power part is preferentially ensured while the adjustable space of each stage of section is fully utilized and the newenergy is consumed to the maximum extent, the enthusiasm of each new energy station to participate in the power market can be fully aroused, the safety of a power grid is ensured, and the control capability of the power grid chain type stable section tide is effectively improved.