Depressed　patients　release　microblog　information　and　pay　attention　to　each　other’s　messages.　After　some　depressed　patients　commit　suicide　or　die　for　other　reasons,　there　are　still　microblog　messages　gathering　constantly,　thus　forming　a　＇tree　hole＇　-　a　channel　for　depressed　patients　to　express　their　despair　and　suicide　wish.　Among　them,　in　2012,　a　microblog　user　died　of　depression,　forming　the　largest　microblog　＇tree　hole＇,　with　more　than　1.6　million　messages.　Based　on　the　data　of　＇tree　hole＇,　this　paper　analyzes　the　behavior　pattern　of　microblog　＇tree　hole＇　users　according　to　the　temporal　characteristics　of　the　message,　so　as　to　obtain　the　crowd　behavior　pattern　characteristics　of　the　potential　risk　persons　of　mental　health　and　the　potential　depressed　patients,　it　is　found　that　the　relative　high　incidence　time　of　depression　and　suicide　is　related　to　the　behavior　pattern.　More　human　and　material　resources　can　be　deployed　to　monitor　and　rescue　the　depression　suicide　potential　during　the　active　period,　and　the　results　can　be　fed　back　to　the　relevant　government　departments　and　social　rescue　agencies,　such　as　the　microblog　Internet　police,　etc.,　so　as　to　make　them　pay　attention　to　it　and　form　a　coordinated　mode　of　the　rescue　of　government-and-society.　©　2020,　Springer　Nature　Switzerland　AG.