Data transmission method and computer

Embodiments of the present invention disclose a data transmission method and a computer, and relates to the field of computer technology, so as to reduce occupancy of a CPU, a bus resource and a memory resource, thereby improving data transmission efficiency. The specific scheme comprises: after receiving a DMA data access request that comprises an identifier of to-be-read data, a first component sending the DMA data access request to a CPU; after receiving the DMA data access request, the CPU acquiring memory address information of the to-be-read data according to the identifier of the to-be-read data; the CPU sending the memory address information of the to-be-read data to the first component; and by using a DDA engine and according to the memory address information of the to-be-read data, the first component acquiring the to-be-read data from a second component. The method provided by the present invention is used in direct data transmission between a first device and a second device.