Through building block experimental devices including pump light source,collimating and focusing system,gain chip,coupled output mirror,frequency doubling crystal and etalon,a comprehensive experiment of laser based on external cavity surface emitting laser are established.The basic principle of laser,frequency change technology,wavelength tuning technology and other experimental contents have been completed.For this experiment,the related contents of laser technology are synthesized,advanced scientific research theory knowledge with experimental practice is combined,and a variety of designed experimental contents is provided to give students autonomy in learning so as to achieve the purpose of promoting experimental teaching.