The invention discloses a power distribution method for a mixed energy powered distributed antenna system. The method comprises the following steps: S1, obtaining channel fading coefficients hk=[h1, k, h2, k, ..., hM, k] from all antenna units to a user k, wherein hm, k represents the channel fading coefficient from the antenna unit m to the user k, and M represents the total number of the antenna units; and S2, acquiring the energy collected by the antenna units, establishing a mathematical optimization model for power distribution, transforming the mathematical optimization model to an equivalent dual problem by adopting a Lagrangian dual method, and coordinating and distributing the power of users in each antenna unit by adopting a sub-gradient method. According to the power distribution method disclosed by the invention, the power consumption of grids of the distributed antenna system can be significantly reduced.