An interference correction type single-point detection current sensor for multiple busbars, the single-point detection current sensor comprising: a plurality of magnetic sensor modules which are brought in insulation contact with or installed adjacent to a plurality of respective busbars, measure currents flowing into the busbars using magnetic sensors, and output the measured currents; a signal collection module (200, 300) which collects the measured signals output by the plurality of magnetic sensor modules; and a signal interference correction module (300, 310) which derives corrected current values from which interference has been removed by calculating amounts of interference between the plurality of busbars in the signals collected by the signal collection module (200, 300) and a temperature measurement module (400, 500); characterised in that the signal interference correction module (300, 310) is configured to comprise: an interference coefficient matrix generation unit (310, 320) which generates an interference coefficient matrix; an interference coefficient derivation unit (320, 330) which derives an interference coefficient of a corresponding busbar using the interference coefficient matrix or an interpolation method; a correction current value calculation unit (330, 340) which derives the corrected current value using the derived corresponding interference coefficient; and an interference correction memory (340, 400) which stores the plurality of generated interference coefficient matrices, and an interference correction equation for deriving the corrected current value using the interference coefficient matrix generated by the interference coefficient matrix generation unit (310, 320) and the interference coefficient; wherein a plurality of the interference coefficient matrices is generated in each predetermined unit within a predetermined temperature range, and the signal interference correction module (300, 310) derives the corrected current value using the interference coefficient matrix that complies with a temperature measured by the temperature measurement module (400, 500). a plurality of magnetic sensor modules which are brought in insulation contact with or installed adjacent to a plurality of respective busbars, measure currents flowing into the busbars using magnetic sensors, and output the measured currents; a signal collection module (200, 300) which collects the measured signals output by the plurality of magnetic sensor modules; and a signal interference correction module (300, 310) which derives corrected current values from which interference has been removed by calculating amounts of interference between the plurality of busbars in the signals collected by the signal collection module (200, 300) and a temperature measurement module (400, 500); characterised in that the signal interference correction module (300, 310) is configured to comprise: an interference coefficient matrix generation unit (310, 320) which generates an interference coefficient matrix; an interference coefficient derivation unit (320, 330) which derives an interference coefficient of a corresponding busbar using the interference coefficient matrix or an interpolation method; a correction current value calculation unit (330, 340) which derives the corrected current value using the derived corresponding interference coefficient; and an interference correction memory (340, 400) which stores the plurality of generated interference coefficient matrices, and an interference correction equation for deriving the corrected current value using the interference coefficient matrix generated by the interference coefficient matrix generation unit (310, 320) and the interference coefficient; wherein a plurality of the interference coefficient matrices is generated in each predetermined unit within a predetermined temperature range, and the signal interference correction module (300, 310) derives the corrected current value using the interference coefficient matrix that complies with a temperature measured by the temperature measurement module (400, 500). an interference coefficient matrix generation unit (310, 320) which generates an interference coefficient matrix; an interference coefficient derivation unit (320, 330) which derives an interference coefficient of a corresponding busbar using the interference coefficient matrix or an interpolation method; a correction current value calculation unit (330, 340) which derives the corrected current value using the derived corresponding interference coefficient; and an interference correction memory (340, 400) which stores the plurality of generated interference coefficient matrices, and an interference correction equation for deriving the corrected current value using the interference coefficient matrix generated by the interference coefficient matrix generation unit (310, 320) and the interference coefficient; wherein a plurality of the interference coefficient matrices is generated in each predetermined unit within a predetermined temperature range, and the signal interference correction module (300, 310) derives the corrected current value using the interference coefficient matrix that complies with a temperature measured by the temperature measurement module (400, 500).