The invention provides a method for improving mechanical performance of a flexible device through a graphene oxide self-assembled composite silver nano wire, wherein the silver nano wire is prepared according to a polyol reduction method. The graphene oxide forms a film with a certain thickness through self-assembling, and then a flexible thin-film device is formed through transferring and combining with the silver nano wire. Simple operation in the whole process is realized. Uniform thickness of the graphene oxide film and remarkable integral combining effect are realized. The flexible transparent conductive film can be realized, and furthermore the method has advantages of high transparency, high conductivity and high stability. Furthermore the method has advantages of simple operation,low equipment requirement and high repeatability. The transparent conductive film prepared according to the method has advantages of high mechanical performance, high transmittance, high conductive performance, high flexibility and high wearing resistance. The transparent conductive film can be widely used in the fields such as solar cell, flexible liquid crystal display device and flexible touchscreen and satisfies a high-quality and high-precision production requirement of an enterprise.