Abstract: ‘Rain classroom’ supports teachers' teaching and management as well as undergraduates' learning and interaction.It can realize the organic connection of different links of classroom teaching (before-during-after of class).The application of ‘rain classroom’ in teaching of Forage Production Science can greatly improve undergraduates' learning enthusiasm and teaching effectiveness.We elaborated the teaching current situation of Forage Production Science,introduced the characteristics of ‘rain classroom’,and expounded the teaching mode of Forage Production Science based on ‘rain classroom’.