Due　to　the　need　to　achieve　the　sustainable　development　of　society,　the　importance　of　sustainable　development　competences　has　reached　unprecedented　heights.　This　paper　constructed　an　SEM　model　and　considered　the　factors　of　contextual　competence　for　sustainability　from　teaching,　student　interaction　and　extracurricular　engagement,　by　conducting　a　questionnaire　survey　among　786　Chinese　engineering　undergraduates.　The　results　indicated　a　significant　and　direct　positive　influence　of　teaching　on　contextual　competences　for　sustainability.　In　addition,　there　is　an　indirect　effect　on　contextual　competence　for　sustainable　development　through　student　interaction　and　extracurricular　engagement.　An　examination　of　the　interlocking　mediating　effects　of　student　inter-action　and　extracurricular　engagement　revealed　that　student　interaction　contributes　to　the　development　of　students＇　contextual　competence　for　sustainable　development　through　its　positive　influence　on　extracurricular　engagement.　This　paper　provides　a　reference　for　the　cultivation　of　contextual　competences　for　sustainability　from　both　theoretical　and　practical　perspectives.