A device with a check joint structure for a connection of an air nozzle of a tire and a connection hose of an air compressor, the device comprising: a box including a body of the air compressor accommodated in the box and started by a power supply; a sealant supply can including an open segment extending downward and configured to accommodate chemical sealant for repairing the tire which is broken, and the sealant supply can including a supply tube; an air nozzle of a tire and a connection hose including a first segment formed on a first end of the connection hose, and the connection hose including a second segment formed on a second end the connection hose, the first segment being connected with the supply tube of the sealant supply can, and the second segment being connected with the air nozzle of the tire; wherein the second segment has a check connector connected thereon, the check connector including a fitting sleeve, a cylindrical base and a valve bolt; wherein the fitting sleeve has a threaded orifice formed in a first end thereof and having female threads, a through orifice defined on a second end of the fitting sleeve, and a projected shoulder formed on an inner wall of the through orifice, wherein the threaded orifice is communicated with the through orifice; wherein the cylindrical base includes a cylindrical room, a stepped coupling segment extending on an outer wall of a first end of the cylindrical base, and a conduit defined in the stepped coupling segment and communicating with the cylindrical room, wherein a diameter of the cylindrical room is more than a diameter of the conduit, and the cylindrical base further includes a first stepped portion formed between the cylindrical room and the conduit; wherein the valve bolt is formed in a column shape and includes a contacting element arranged on a first end of the valve bolt; wherein a second end of the valve bolt is inserted through the cylindrical room of the cylindrical base; characterized in that a diameter of the projected shoulder is more than a diameter of the through orifice; the check connector further including a first spring received into the cylindrical room of the cylindrical base so that a first end of the first spring abuts against the first stepped portion; the second end of the valve bolt being further inserted through the conduit of the stepped coupling segment to extend out of the stepped coupling segment of the cylindrical base; the contacting element abutting against a second end of the first spring, wherein a first abutting ring is fitted on the second end of the valve bolt; and the first spring pushing the valve bolt so that the first abutting ring of the valve bolt contacts with the stepped coupling segment of the cylindrical base and closes the conduit. a box including a body of the air compressor accommodated in the box and started by a power supply; a sealant supply can including an open segment extending downward and configured to accommodate chemical sealant for repairing the tire which is broken, and the sealant supply can including a supply tube; an air nozzle of a tire and a connection hose including a first segment formed on a first end of the connection hose, and the connection hose including a second segment formed on a second end the connection hose, the first segment being connected with the supply tube of the sealant supply can, and the second segment being connected with the air nozzle of the tire; wherein the second segment has a check connector connected thereon, the check connector including a fitting sleeve, a cylindrical base and a valve bolt; wherein the fitting sleeve has a threaded orifice formed in a first end thereof and having female threads, a through orifice defined on a second end of the fitting sleeve, and a projected shoulder formed on an inner wall of the through orifice, wherein the threaded orifice is communicated with the through orifice; wherein the cylindrical base includes a cylindrical room, a stepped coupling segment extending on an outer wall of a first end of the cylindrical base, and a conduit defined in the stepped coupling segment and communicating with the cylindrical room, wherein a diameter of the cylindrical room is more than a diameter of the conduit, and the cylindrical base further includes a first stepped portion formed between the cylindrical room and the conduit; wherein the valve bolt is formed in a column shape and includes a contacting element arranged on a first end of the valve bolt; wherein a second end of the valve bolt is inserted through the cylindrical room of the cylindrical base; characterized in that a diameter of the projected shoulder is more than a diameter of the through orifice; the check connector further including a first spring received into the cylindrical room of the cylindrical base so that a first end of the first spring abuts against the first stepped portion; the second end of the valve bolt being further inserted through the conduit of the stepped coupling segment to extend out of the stepped coupling segment of the cylindrical base; the contacting element abutting against a second end of the first spring, wherein a first abutting ring is fitted on the second end of the valve bolt; and the first spring pushing the valve bolt so that the first abutting ring of the valve bolt contacts with the stepped coupling segment of the cylindrical base and closes the conduit.