The invention relates to a united resource distribution method based on channel aggregation in a heterogeneous network. The method comprises the steps of determining an initial population G in a genetic algorithm, wherein each individual in G is an available channel distribution scheme; performing crossing and variant genetic operation on each individual to generate a new population G1, using a Zoutendijk available direction method to find the optical power distribution of each individual in G1 and determining a power consumption ratio of the individual, selecting the m individuals with the lowest power consumption ratio to serve as the initial population to be used in next iteration, repeating the above process until the number of iterations reaches a preset number, acquiring the optimalindividual with the lowest power consumption ratio, using the channel distribution of the optimal individual as a channel distribution scheme of the whole network, and using a power distribution scheme of the optimal individual as the power distribution scheme of the whole network. Via the iterative optimizing capacity of the genetic algorithm, the optimal power distribution value under the optimal channel distribution condition can be continuously found, and thus the power consumption of the network is minimized under the premise of meeting the communication rate of the user equipment.