Abstract: A transplantation method and a source-to-source compiler are provided. The method includes receiving common platform algorithm source code that is unrelated to a platform chip architecture, is written for an application program, and uses a general operator and a general data type; performing conversion on the general operator and the general data type in the common platform algorithm source code to obtain target platform algorithm source code that meets a target platform operation requirement; and sending the target platform algorithm source code to a target platform compiler. In the embodiments, the target platform algorithm source code that meets the target platform operation requirement can be obtained; and cross-platform source-to-source conversion can be implemented, and the problem that cross-platform source-to-source conversion cannot be implemented in the prior art is solved.