This　paper　introduces　key　technologies　and　methods　of　comprehensive　information　automatic　collection,　wireless　transmission,　forewarning　system　in　tunnel　construction.　Combining　with　modern　telemetry　technology,　the　system　integrates　sensor　data　acquisition　(frequency,　voltage,　current　simultaneously,　digital　etc.)　of　selected　measuring　section,　three-dimensional　laser　scanning,　advance　geological　forecast,　blasting　vibration　monitoring　and　visualization　monitoring.　It　can　realize　tunnel　construction　face　image　real-time　display　and　analysis,　certain　tunnel　construction　monitoring　data　automatic　collection　and　analysis,　form　the　tunnel　construction　comprehensive　information　monitoring　system,　ensure　tunnel　construction　safety　in　complex　geological　conditions　of　surrounding　rock.　The　comprehensive,　real-time　and　warning　characteristics　of　TIS　have　an　important　practical　meaning　for　dynamic　design,　construction　management　and　improving　the　construction　safety　degree.