In the study of contextualism, the most noticeable and at the same time ambiguous problem is how to ascertain the boundaries of context. This article tries to explore the boundaries of context and the significance of the “contextualizing movement” which began in the 1980s. The establishment of boundaries can be analyzed from three aspects: the syntactic boundary, the semantic boundary, and the pragmatic boundary. This differentiation offers meaningful perspectives for grasping the method of contextual analysis, strengthening its position and influence in scientific explanation.