Training method and device of cycle prediction model, cycle prediction method and device

The invention relates to a training method and device of a cycle prediction model, a cycle prediction method and device, and relates to the technical field of machine learning. The method comprises the steps of calculating a historical order behavior sequence of a historical user and an actual re-purchase cycle of the historical articles included in a historical order according to the historical user data; constructing a data set according to the historical articles, the actual re-purchase cycle, the historical order behavior sequence and the historical user portraits in the historical user data; inputting the historical articles, the historical order behavior sequence and the historical user portrait included in the data set into a to-be-trained period prediction model to obtain a predicted re-purchase period of the historical article; and constructing a first loss function according to the actual re-purchase cycle and the predicted re-purchase cycle in the data set, and training the to-be-trained cycle pred