Abstract Research purposes: The CMMB system into the metro is a new topic as a popular media． According to technical features and technical requirements of CMMB system，the paper is mainly to research on the CMMB system how into metro in use of existing communication resource，and gives detailed system implement technological solutions．
Research conclusions: Through research on solution of CMMB system into metro，the paper draws following conclutions: Based on the existing communication resource，CMMB system can share the station subsystem with PIS system and radio coverage subsystem with civil mobile communication system in metro; CMMB system radio signaling coverage radius using antenna is about 10 meters，and coverage distance using leaking cable is 1． 2km without radio repeater，and CMMB system radio signaling synchronization mode uses GPS; CMMB system frequency band is between 600 MHz and 800 MHz into metro，and the equipment and materials shall meet requirements of metro environment in engineering construction．
Li JiaYi． Analysis of Interference in Wireless Technology between Passenger Information and Communication Based Train Control System in Subway ［J］． Journal of Railway Engineering Society，2011( 6) : 88 － 91．
2012, Vol. 29 
