The invention discloses a soft-decision cooperative spectrum sensing data fusion method in a mobile context and relates to the technical field of information and communication. The soft-decision cooperative spectrum sensing data fusion method solves problems, of a conventional soft-decision cooperative spectrum sensing data fusion method, that it is difficult for the conventional fusion method to be suitable for the mobile context, that the conventional soft-decision data fusion method depends on the signal-to-noise ratio of a cognitive user and the prior knowledge of a position; and that the conventional fusion method is poor in channel adaptability. The soft-decision cooperative spectrum sensing data fusion method comprises that each mobile cognitive user independently detects the local energy and uploads detection results to a fusion center; the fusion center computes a weight factor corresponding to the current fusion for each user just according to the detection results; and the fusion center solves a weighted objective function by using the detection results and the corresponding weighted factors and gives a final decision. The soft-decision cooperative spectrum sensing data fusion method is suitable for cognitive radio soft-decision cooperative spectrum sensing in information and communication technology.