The invention discloses an ontology fusion preprocessing method for multi-source heterogeneous resources. The method comprises the following steps: S1, extracting an entity concept in an ontology model; S2, extracting a relation concept in the ontology model; S3, extracting an attribute concept in the ontology model; S4, exporting a JSON data file; S5, discovering an obvious structure of the datato be acquired, and expressing the two structures by using a regular expression; s6, returning subscripts of the content meeting the regular expression structure in the source data; s7, acquiring sub-strings meeting conditions; s8, further performing character string matching on the sub-character strings; s9, fusing the labels of the source data; and S10, storing the data, wherein the storage format is a structured format. According to the method, the ontology modeling result can be converted into the JSON narration, and the syntax structure definition for consistent fusion of heterogeneous (semi-) structured data is given.