Enzyme-induced　carbonate　precipitation(EICP)has　emerged　as　an　innovative　soil　stabilization　tech-nology　to　precipitate　CaCO3　by　catalyzing　urea　decomposition.Although　extensive　efforts　have　been　made　to　increase　the　calcium　carbonate　content(CCC)formed　in　the　EICP　process　for　the　better　bio-cementation　effect,the　cementability　and　micromechanical　properties　of　CaCO3　are　rarely　known.A　study　of　the　cementitious　characteristics　and　micromechanical　properties　of　CaCO3　precipitates　with　different　mixing　percentages　of　crystal　morphology　is　essential　for　soil　improvement.In　the　present　study,ultrasonic　oscillation　tests　and　nanoindentation　tests　were　performed　to　investigate　the　cementability　and　micromechanical　properties　of　CaCO3　precipitate.The　results　show　that　the　cementability　and　micromechanical　properties　of　CaCO3　precipitate　are　related　to　the　composition　of　the　crystal　morphology.A　high　content　of　calcite　is　beneficial　to　improve　the　adhesion　of　calcium　carbonate　precipitate.Calcite　has　better　mechanical　properties(elastic　modulus,hardness　and　ductility)than　vaterite,and　the　presence　of　vaterite　can　significantly　affect　the　measured　value　of　mechanical　properties　in　nanoindentation　tests.The　ductility　of　CaCO3　precipitate　induced　by　crude　soybean　urease(CSU)is　higher　than　that　of　CaCO3　precipitate　induced　by　commercially　available　pure　enzyme,suggesting　that　commercially　available　pure　enzyme　can　be　replaced　by　CSU　for　cost-effective　field-scale　engineering　applications.This　work　can　provide　insight　into　optimizing　the　properties　of　CaCO3　precipitate　from　the　micro-scale.