A　systematic　analysis　and　discussion　of　the　causes　of　house　cracking　are　conducted　by　testing　the　blast　vibration　velocity　of　typical　neighboring　houses,　analyzing　the　types　of　house　cracking,　monitoring　the　characteris-tics　of　house　cracks　and　calculating　the　temperature　stress　at　the　roof　and　wall　based　on　an　assessment　of　highway　tunnel　blasting　vibrations　leading　to　cracking　of　neighboring　houses.　The　results　show　that　the　main　cause　of　house　cracking　adjacent　to　the　tunnel　is　temperature　stress,　not　blasting　vibration.　©　2018,　Editorial　Office　of　＂Modern　Tunnelling　Technology＂.　All　right　reserved.