HARQ-ACK information transmission method

The invention discloses an HARQ-ACK information transmission method. The method comprises the steps that in a service flow self-adaptation TDD system, when feedback is carried out on an HARQ-ACK of a downlink sub-frame, the downlink sub-frame in a binding window is divided into two classes, PUCCH resource mapping is carried out on a first class sub-frame and a second class sub-frame respectively, the resource mapping is carried out on the first class sub-frame according to the way of non-service flow self-adaptation, and the resource mapping is carried out on the second class sub-frame according to a certain sub-frame sequence. When uplink and downlink configuration changes dynamically, the HARQ-ACK information transmission method can dynamically adjust the distributed PUCCH resource according to the actual configuration, and therefore effectively saves the physical resources of an uplink sub-frame.