The　article　describes　an　experimental　study　on　the　bond-slip　performance　between　the　pultruded　glass　fiber-reinforced　polymer　(GFRP)　tube　and　the　nano-CaCO3　concrete.　Taking　the　nano-CaCO3　concrete　strength　and　GFRP　tube　thickness　as　primary　parameters,　nine　specimens　were　designed　and　tested　to　study　the　influence　of　these　parameters　on　the　bond　strength　of　the　specimens.　Besides,　three　specimens　filled　with　the　ordinary　concrete　were　also　tested　by　using　the　push-out　tests　to　make　comparisons　with　the　bond　performance　of　the　specimens　filled　with　nano-CaCO3　concrete.　A　total　of　four　push-out　tests　were　conducted　on　each　specimen.　The　experimental　results　indicate　that　there　are　two　types　of　axial　load-slip　curves　for　each　specimen　in　four　push-out　tests.　Moreover,　comparison　of　the　results　of　the　push-out　tests　in　the　same　direction　shows　that　the　bond　failure　load　of　the　specimen　decreases　with　the　increase　in　the　number　of　push-out　tests.　Based　on　the　analysis　of　the　test　results,　it　is　shown　that　the　bond　performance　between　the　GFRP　tube　and　the　nano-CaCO3　concrete　is　better　than　that　between　the　GFRP　tube　and　the　ordinary　concrete.　Furthermore,　as　the　nano-CaCO3　concrete　strength　increases,　the　bond　strength　of　the　specimens　decreases,　indicating　that　the　concrete　strength　has　a　negative　effect　on　the　bond　strength.　When　the　nano-CaCO3　concrete　strength　is　relatively　smaller　(C20),　the　bond　strength　of　the　specimens　decreases　with　the　increase　in　the　thickness　of　the　GFRP　tube.　However,　when　the　nano-CaCO3　concrete　strength　is　relatively　larger　C30　and　C40),　the　bond　strength　of　the　specimens　increases　as　the　thickness　of　the　GFRP　tube　increases.