Abstract: In order to cultivate the students' challenging learning ability and improve the comprehensive quality of innovative learning,theDigital design FPGA application course has carried out a curriculum reform of challenging learning.Based on the characteristics of the course and students' situation,the experimental environment was built by using the pocket laboratory experiment board for students,and the experimental teaching case ofasynchronous serial communication design and communication was designed.This paper introduces the teaching design and implementation methods of the experimental case.The implementation method is formed on the basis of challenging research and teaching experience accumulation,and has been perfected in many teaching practices,and teaching effect is good,which has certain reference value for the challenging teaching of other courses.