Improving　agricultural　production　efficiency　is　an　effective　means　to　ensure　food　security　and　promote　agricultural　sustainable　development　in　China.　Stable　agricultural　land　property　rights　help　optimize　the　allocation　of　production　factors　and　improve　production　efficiency,　and　it　is　of　great　practical　significance　to　study　the　influence　of　farmland　tenure　security　on　agricultural　production　efficiency.　Therefore,　this　research　utilizes　the　2018　data　of　the　China　Labor　Dynamics　Survey　(CLDS)　to　analyze　the　influence　of　farmland　tenure　security　on　agricultural　production　efficiency　and　its　internal　transmission　mechanism　under　the　background　of　agricultural　land　ownership　confirmation.　The　results　show　that　the　enhancement　of　farmland　tenure　security　not　only　directly　improves　agricultural　production　efficiency,　but　also　indirectly　affects　agricultural　production　efficiency　through　the　intermediary　variable　of　agricultural　investment.　Moreover,　it　also　shows　that　farmland　tenure　security　has　heterogeneity　effects　on　different　farmer　regions　and　production　modes　and　can　significantly　improve　the　production　efficiency　of　farmers　in　plain　and　hilly　areas　who　adopt　fully　mechanized　and　partially　mechanized　farming.　We　suggest　that　policymakers　should　also　deepen　the　reform　of　the　rural　factor　market,　develop　diversified　rural　financial　institutions,　actively　promote　the　involvement　of　small　farmers　in　the　public　sector　economy,　and　improve　the　service　level　of　agricultural　machinery　in　order　to　guide　the　development　of　the　tertiary　industry　in　non-plain　areas　and　to　reduce　the　land　endowment　effect　of　farmers.