Purpose　-　This　paper　aims　to　investigate　the　curvilinear　effects　of　firms＇　market　learning　on　radical　innovation　and　the　moderation　effects　of　the　focal　firms＇　horizontal　ties　and　vertical　ties.　Design/methodology/approach　-　This　study　uses　regression　analysis　with　the　survey　data　from　303　Chinese　firms.　Findings　-　Explorative/exploitative　market　learning　has　an　inverted　U-shaped/U-shaped　effect　on　radical　innovation.　The　effects　of　explorative　market　learning　on　radical　innovation　increase　when　firms　have　strong　horizontal　ties,　but　decrease　when　firms　have　strong　vertical　ties.　The　opposite　is　true　for　the　effects　of　exploitative　market　learning.　Research　limitations/implications　-　This　study　uses　unilateral　data　to　examine　the　moderation　effects　of　the　focal　firms＇　vertical　and　horizontal　ties　on　the　market　learning-radical　innovation　links.　Future　research　that　conducted　in　the　dyadic-paradigm　would　be　preferable　to　test　the　generalizability　of　this　research　and　address　the　potential　changes.　Originality/value　-　The　value　of　the　current　study　centers　on　its　integrated　framework　that　incorporates　organizational　learning　theory　and　the　social　network　perspective　to　account　for　radical　innovation.　The　integrative　view　helps　us　to　interpret　the　curvilinear　effects　of　market　learning　on　radical　innovation　and　outlines　the　moderation　mechanisms　of　horizontal　ties　and　vertical　ties.