The invention provides a cloud wireless access network computing resource allocation method and system based on traffic prediction. The cloud wireless access network computing resource allocation method comprises the following steps: a prediction step: predicting the traffic of a length service at a T moment; and a calculation and judgment step: calculating the variance of the predicted traffic time sequence, judging whether the variance is smaller than a threshold value or not, if yes, adopting a BFD algorithm to perform resource distribution at each moment of the T moment, and otherwise, adopting a BFD-based discrete particle swarm algorithm to perform resource distribution. The cloud wireless access network computing resource allocation method has the beneficial effects that unnecessaryVNF migration is avoided, the fluctuation of the communication service of the cloud wireless access network is reduced, and meanwhile, the energy consumption of the BBU pool is reduced.