A food reflux reducing two-piece nasogastric tube, comprising: a first tube body having a first connector on one end and an insertion portion on another end, a first positioning portion disposed on one end of the first connector away from the first tube body , a protrusion edge being disposed on an outer side of the first connector in adjacent to the first positioning portion , the first connector comprising a through hole formed in an axial direction and connected with the first tube body , the through hole comprising an elastic seal portion disposed in adjacent to the first positioning portion , the seal portion being provided with a cross break which is normally in a sealing status, a convex portion being disposed on an inner edge of the through hole between the seal portion and the first positioning portion ; and a second tube body having an irrigation portion disposed on one end and a second connector disposed on another end, a second positioning portion being disposed on one end of the second connector away from the second tube body , an insertion combination tube extending from the second positioning portion , the insertion combination tube being connected with the second tube body , two elastic arms extending from an outer side of the second connector toward the insertion combination tube , with a hook portion disposed on a distal end of each of the two elastic arms ; wherein, when in use, the second connector is inserted into the through hole of the first connector through the insertion combination tube , such that the insertion combination tube expands the cross break , an outer periphery of the insertion combination tube tightly contacts and abuts against the convex portion , the second positioning portion abuts against the first positioning portion , and the hook portion of the two elastic arms hooks the protrusion edge , such that the second connector is connected with the first connector , and the second tube body is connected with the first tube body . a first tube body having a first connector on one end and an insertion portion on another end, a first positioning portion disposed on one end of the first connector away from the first tube body , a protrusion edge being disposed on an outer side of the first connector in adjacent to the first positioning portion , the first connector comprising a through hole formed in an axial direction and connected with the first tube body , the through hole comprising an elastic seal portion disposed in adjacent to the first positioning portion , the seal portion being provided with a cross break which is normally in a sealing status, a convex portion being disposed on an inner edge of the through hole between the seal portion and the first positioning portion ; and a second tube body having an irrigation portion disposed on one end and a second connector disposed on another end, a second positioning portion being disposed on one end of the second connector away from the second tube body , an insertion combination tube extending from the second positioning portion , the insertion combination tube being connected with the second tube body , two elastic arms extending from an outer side of the second connector toward the insertion combination tube , with a hook portion disposed on a distal end of each of the two elastic arms ; wherein, when in use, the second connector is inserted into the through hole of the first connector through the insertion combination tube , such that the insertion combination tube expands the cross break , an outer periphery of the insertion combination tube tightly contacts and abuts against the convex portion , the second positioning portion abuts against the first positioning portion , and the hook portion of the two elastic arms hooks the protrusion edge , such that the second connector is connected with the first connector , and the second tube body is connected with the first tube body . <EOS>