Data transmission method and device, equipment and storage medium

The invention provides a data transmission method and device, equipment and a storage medium, and belongs to the technical field of computers. The method comprises the steps that a first FPGA receives a first data packet from a second FPGA; storing the first data packet to one cache subunit in the first cache unit; in response to the fact that the number of the cache subunits which do not store the data in the first cache unit is equal to the margin threshold value, first prompt information is sent to a second FPGA, and the first prompt information is used for indicating that the number of the cache subunits which do not store the data in the first cache unit is equal to the margin threshold value; the margin threshold is determined according to the size of the maximum data packet and the minimum data packet which can be transmitted between the first FPGA and the second FPGA. According to the method, the packet loss phenomenon occurring during data transmission between the FPGAs can be effectively reduced, an