Considering job resources of college teachers as a mediating variable, this study analyzed the relationship between job crafting and job engagement and established a model of the mechanism underlying the effects of job crafting on job engagement. This theoretical hypothesis model was empirically validated using 300 valid questionnaires completed by college teachers in Hebei Province, China, who were selected through convenience sampling. Job crafting directly affected job resources, and job resources exerted a direct effect on job engagement. However, job resources played a full mediating role in the relationship between job crafting and job engagement after it was added as a mediating variable.