Micro-seismic　technology　is　an　important　means　of　monitoring　the　stability　of　concrete　construction.　The　characteristic　indices　of　micro-seismic　signals　during　the　cracking　process　of　material　are　the　premise　of　accurately　predicting.　The　soundless　cracking　agent　was　applied　to　realizing　static　micro-seismic　tensile　failure　at　different　rates,　and　the　coal　or　rock　dynamic　disaster　experimental　simulation　system　of　ZDKT-1　type　was　used　for　real-time　monitoring　the　micro-seismic　signals　in　the　cracking　processes.　By　analyzing　the　variation　characteristics　of　micro-seismic　signal　amplitude,　energy　and　spectrum　of　micro-seismic　signals　during　the　static　cracking　processes　of　cement　mortar,　it　is　found　that　as　a　quasi-homogeneous　material,　there　are　three　longitudinal　cracks,　but　no　transverse　cracks　after　static　cracking　in　cement　mortar.　Both　amplitude　and　spectrum　of　micro-seismic　signals　are　related　to　the　static　cracking　rate,　and　the　greater　the　cracking　rate　is,　the　greater　the　average　amplitude　of　micro-seismic　signals　is　and　the　wider　the　frequency　domain　of　signals　is.　The　number　of　micro-seismic　events　is　related　to　the　eventual　total　crack　area.　The　larger　the　crack　area　is,　the　more　the　micro-seismic　events　are.　The　amplitude　and　energy　of　micro-seismic　signals　in　the　static　cracking　process　do　not　change　monotonically,　but　switch　between　weak　and　strong,　and　the　microseisms　signals　were　paroxysmal　in　the　entire　process.　©　2017,　Editorial　Office　of　China　Civil　Engineering　Journal.　All　right　reserved.