The invention discloses a bilingual sentence alignment method which comprises a clause step, a participle step, an alignment step, a matching step and an execution step; wherein, the alignment step concretely comprises: a region division step which respectively divides the first language and the second language requiring alignment into a plurality of comparing regions containing sentences of the first language and the second language according to prearranged region division rules; in the matching step, the mutual matching rate of every pair of sentences in the comparing region of every pair of the first language and the corresponding second language is calculated and the combinations of the mutually matched sentences of the first language and the second language according to the mutual matching rate is determined; in the execution step, the alignment operation on the combination of the sentences of the first language and the second language with the biggest mutual matching rate is executed. A corresponding bilingual sentence alignment device is also disclosed by the invention. The invention can greatly improve the aligning efficiency and accelerate the constructing speed of corpuses.