Data transmission method, data transmission device, terminal device and storage medium

The embodiment of the invention discloses a data transmission method, a data transmission device, a terminal device and a storage medium. The method comprises the steps of acquiring a web page source code by a terminal; converting the web page source code into a first character string by the terminal; converting to-be-transmitted parameters into a second character string by the terminal; embedding the second character string into the first character string by the terminal; and loading the first character string embedded with the second character string into a web page by the terminal. According to the data transmission method provided in the invention, the web page source code is parsed and embedded with to-be-transmitted parameters. In this way, during the data transmission process, the key parameter information is prevented from being hijacked by a third party and maliciously modified. As a result, the safety of data transmission between the native page of the terminal and the web page is greatly improved.