Data transmission method and apparatus

Disclosed are a data transmission method and apparatus, which relate to the technical field of communication networks, and can solve the problem that the prior art cannot improve a peak rate on the premise of correct decoding. In the embodiments of the present invention, a TBS is determined according to a pre-set TBS table; data is encoded and modulated according to the determined TBS to obtain a data transmission block, wherein the effective transmission code rate of the data transmission block in first transmission is less than or equal to 0.961 or 0.941; and then the data transmission block is transmitted. The solution provided by the embodiments of the present invention is applicable to a data transmission process.