The invention provides a method for constructing a plurality of groups of orthogonal sequence sets. The method comprises the following steps of : S1, constructing a first series of sequence sets; step S2 : Construction and allocation of the second series of sequence sets The capacity of users (sequences) in the cellular network of the present invention is large, and different numbers of users are flexibly allocated to different cells, so that any three adjacent cells provide the maximum number of orthogonal sequence sets. At the same time, the sequences in adjacent cells in the cellular network of the present invention are orthogonal in pairs, and the correlation value is large when the sequences of non-adjacent cells are not orthogonal; when sequences are repeatedly allocated, the multiplexing distance is large. Normally, the multiplexing distance becomes larger as p increases.