Abstract: In order to meet the needs of the experimental teaching of television theory，the digital television principle experiment teaching platform based on Matlab software is developed． According to the teaching content of digital television theory． Six experimental modules are designed，each module contains different experimental projects，covering the important aspects of digital television signal generation，processing and compression coding prediction． The design principles of the experimental module are given，and the experimental principle and content of the module are introduced． The application of the specific experimental module is taken as an example to explain the use of the platform． The practical application shows that the digital television experiment teaching
platform meets the demand of experimental teaching and has achieved good teaching effect．

Key words: principles of digital television, experimental teaching platform, Matlab, digital image processing