The invention discloses an air foam flow distribution device and method. The distribution device is used for distributing air foam to N injection wells; the distribution device comprises an air compressor set, a liquid injection pump set, N air flow control units and N liquid flow control units; the N air flow control units are communicated with the air compressor set and are used for inputting compressed air to an injection pipeline; the N liquid flow control units are communicated with the liquid injection pump set and are used for inputting liquid to the injection pipeline; and liquid and the compressed air are mixed and form air foam, and the air foam enter the N injection wells. The N air flow control units and the N liquid flow control units are arranged to control the flow of the liquid and the gas which are not mixed, and therefore the control and distribution of the flow are achieved, and the technical problem existing in the prior art that the flow of the gas in each well cannot be distributed automatically is solved.