The purpose of this paper was to explore the collaborative learning model of college Japanese under the network environment, and explore the implementation and effect of the collaborative learning model of college Japanese under the network environment, so as to improve students' comprehensive quality in terms of language expression, cross-cultural communication, team cooperation, etc. Through questionnaires and practical practice, this paper studied the implementation and effect of the collaborative learning model of college Japanese under the network environment, and analyzed the necessity of implementing the model. The results showed that 82% of the students believed that collaborative learning had a positive effect on improving their listening, speaking, reading and writing skills. The implementation of the collaborative learning model of college Japanese in the network environment could improve students' learning efficiency and language expression ability, and had significant contributions to enhancing cooperation awareness and cross-cultural communication ability.