Provided in the present disclosure are a data processing method, apparatus and device, which are applied to a matrix operation, and a storage medium. The data processing method comprises: determining at least one first vector register, which stores a first matrix, and at least one second vector register, which stores a second matrix, wherein the first matrix comprises a plurality of pieces of first operation data, and the second matrix comprises a plurality of pieces of second operation data; acquiring first data selection information and second data selection information; selecting at least one piece of first operation data from among the plurality of pieces of first operation data on the basis of the first data selection information, so as to obtain at least one piece of first target operation data; and selecting at least one piece of second operation data from among the plurality of pieces of second operation data on the basis of the second data selection information, so as to obtain at least one piece of second target operation data. By means of the data processing method, full use is made of matrix characteristics, so as to effectively multiplex data between threads, thereby greatly reducing the number of times of data reading, and reducing power consumption.