The invention relates to a streaming data processing method and a device. The method comprises the following steps: performing a slicing operation on received streaming data according to a time dimension to obtain a plurality of data slices; according to the length information of the time window, the operation of adding a header data set to each data slice being carried out to obtain a distributeddata set with a header; performing a batch operation on the distributed data set having a header; a header-removed data operation being performed on the distributed data set data having a header after the batch operation to obtain a header-removed data slice. The embodiment of the invention can not only ensure the integrity of the associated data so as not to cause the loss of a part of the calculation result, but also remove the redundant data so as to improve the data calculation performance.