Research　purposes:　With　the　powerful　development　of　the　urban　rail　transit,　three　are　more　and　more　new　tracks　to　cross　the　existing　track　engineering.　However,　it　is　difficult　for　the　traditional　construction　technology　to　control　the　settlement　of　the　existing　structures　and　it　needs　higher　cost.　In　this　paper,　combined　with　the　construction　of　the　Gongzhufen　Station　of　the　Line　10　of　Beijing　metro　to　under-cross　the　Gongzhufen　Station　of　the　Line　1,　the　introduction　is　given　to　the　construction　technology　that　is　available　for　effective　control　of　the　settlement　of　the　existing　structure　with　the　appropriate　cost　to　provide　the　reference　to　the　similar　works.　Research　conclusions:　(1)　The　settlement　of　the　bottom　plate　structure　of　the　existing　station　is　affected　by　the　release　of　stress　of　the　working　face,　the　disturbance　to　bottom　during　excavation,　the　excavation　height,　the　long　closure　time　of　the　primary　support　structure　and　no　timely　jacking　of　the　jack,　and　the　release　of　the　stress　of　the　working　face　is　the　main　reason　for　the　settlement　of　the　existing　structure.　(2)　The　settlement　of　the　existing　structure　can　be　effectively　controlled　by　taking　the　measures　of　adding　the　temporary　columns　and　jacks,　reinforcing　the　foundation　base　with　steel　frame,　grouting　to　the　back　of　the　primary　support　with　extreme　fine　cement　paste　and　jacking　up　by　jacks,　and　the　jacking　up　by　the　jacks　is　the　most　powerful　means　to　control　the　settlement.　(3)　The　CRD+top　brace　control　technology　is　available　for　effective　control　of　the　settlement　of　the　existing　station　and　meet　the　settlement　of　3　mm.