A content transmission method, comprising: obtaining, by a first terminal device, a first instruction, wherein the first instruction indicates that the first terminal device needs to perform content transmission with another terminal device; sending, by the first terminal device, first information to a second terminal device in response to the first instruction, wherein the first information comprises status information of a first interface presented by a display of the first terminal device, wherein the status information of the first interface comprises at least one of the following: a type of the first interface or a time at which the first interface is most recently operated, and wherein the type of the first interface and/or the time at which the first interface is most recently operated are to-be-used by the second terminal device to determine whether a content transmission direction is that the first terminal device transmits content to the second terminal device or that the second terminal device transmits content to the first terminal device; and if the content transmission direction determined by the second terminal device is that the first terminal device transmits content to the second terminal device, the method further comprises: receiving, by the first terminal device, content transmission direction indication information from the second terminal device; and determining, by the first terminal device, first content, wherein the first content is the first interface presented by the display of the first terminal device, or the first content is content in the first interface; and sending, by the first terminal device, the first content to the second terminal device, so that the second terminal device displays the first content; and if the content transmission direction determined by the second terminal device is that the second terminal device transmits content to the first terminal device, the method further comprises: receiving, by the first terminal device, second content from the second terminal device; and displaying, by the first terminal device, the second content. obtaining, by a first terminal device, a first instruction, wherein the first instruction indicates that the first terminal device needs to perform content transmission with another terminal device; sending, by the first terminal device, first information to a second terminal device in response to the first instruction, wherein the first information comprises status information of a first interface presented by a display of the first terminal device, wherein the status information of the first interface comprises at least one of the following: a type of the first interface or a time at which the first interface is most recently operated, and wherein the type of the first interface and/or the time at which the first interface is most recently operated are to-be-used by the second terminal device to determine whether a content transmission direction is that the first terminal device transmits content to the second terminal device or that the second terminal device transmits content to the first terminal device; and if the content transmission direction determined by the second terminal device is that the first terminal device transmits content to the second terminal device, the method further comprises: receiving, by the first terminal device, content transmission direction indication information from the second terminal device; and determining, by the first terminal device, first content, wherein the first content is the first interface presented by the display of the first terminal device, or the first content is content in the first interface; and sending, by the first terminal device, the first content to the second terminal device, so that the second terminal device displays the first content; and if the content transmission direction determined by the second terminal device is that the second terminal device transmits content to the first terminal device, the method further comprises: receiving, by the first terminal device, second content from the second terminal device; and displaying, by the first terminal device, the second content. receiving, by the first terminal device, content transmission direction indication information from the second terminal device; and determining, by the first terminal device, first content, wherein the first content is the first interface presented by the display of the first terminal device, or the first content is content in the first interface; and sending, by the first terminal device, the first content to the second terminal device, so that the second terminal device displays the first content; and if the content transmission direction determined by the second terminal device is that the second terminal device transmits content to the first terminal device, the method further comprises: receiving, by the first terminal device, second content from the second terminal device; and displaying, by the first terminal device, the second content. receiving, by the first terminal device, second content from the second terminal device; and displaying, by the first terminal device, the second content.