Provided are a resource allocation method and device and an information feedback method and device. The resource allocation method includes: a resource allocation sending end sends information about resources allocated to a resource allocation receiving end to the resource allocation receiving end through a first portion and a second portion of total indication amount Q bits, the first portion contains first indication amount Q1 bits, and the second portion contains second indication amount Q2 bits, the number of resources allocated to the resource allocation receiving end is K, resource indexes corresponding to the K resources are Si, i∈[0, 1, 2 . . . K−1], Si