The invention discloses a method for converting an algorithm model of the method into source codes based on an RSCAD simulation system. The method includes the following steps that first, a graphic function library corresponding to basis function blocks in the RSCAD simulation system is established; second, a custom function library corresponding to custom function blocks in the RSCAD simulation system is established; third, a converting relation is configured and defined, an RSCAD modeling file is read through conversion, and algorithm file source codes are generated. Modeling file conversion based on the RSCAD simulation system is successfully achieved through the method, the algorithm file source codes can be automatically generated, development personnel do not need to program thousands of lines of codes manually, and therefore production efficiency and design quality are improved, and innovation is made convenient to perform.