The invention discloses a channel dynamic configuration method comprising the steps that cell level resource usage statistical data are periodically acquired; a cell parameter adjusting instruction is generated according to the cell level resource usage statistical data acquired in the current period and the preset parameter threshold; and cell channel resource allocation is adjusted according to the generated cell parameter adjusting instruction. The invention also discloses a channel dynamic configuration device simultaneously. With application of the channel dynamic configuration method, resources can be periodically adjusted so that network change can be rapidly and flexibly responded and communication efficiency can be enhanced.