The present application provides a data transmission method and an electronic device. The method comprises: an electronic device first establishes an MPTCP connection with an application server, wherein the MPTCP connection comprises a first TCP connection corresponding to a cellular network and a second TCP connection corresponding to a WiFi network; then the electronic device receives indication information from the application server, wherein the indication information comprises a type identifier and a parameter for indicating a bandwidth requirement, and the type identifier is used for indicating the type of a data stream sent by the application server; if the type identifier is a first identifier indicating a low requirement on a data transmission delay, the electronic device receives the data stream using the second TCP connection within a first period of time after receiving the indication information; if an accumulated data volume actually received by the electronic device within the first period of time is less than a product of the parameter and a duration corresponding to the first period of time, the electronic device receives the data stream simultaneously using the first TCP connection and the second TCP connection within a second period of time.
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