The utility model discloses a vibrating string type precision water level gauge, which comprises an anti-fouling water inlet cylinder part, a sensitive part, a floater and a hanging hook, wherein the sensitive part is positioned on the upper part of the anti-fouling water inlet cylinder part; the floater is connected to the lower part of the sensitive part through the hanging hook and hung inside the anti-fouling water inlet cylinder part; the sensitive part comprises a cable sealing joint, a protection shell, a string core sensing part, an anti-rotating pin shaft, a guide sleeve and a blocking cover; a sealing ring is arranged between the lower part of the string core sensing part and the protection shell; the lower end of the string core sensing part is connected with the anti-rotating pin shaft through a spring; the guide sleeve is connected to the lower part of the protection shell; the anti-rotating pin shaft is positioned inside the guide sleeve; the blocking cover is arranged at the bottom of the guide sleeve; and the anti-rotating pin shaft is connected with the hanging hook. By the vibrating string type precision water level gauge, the problems that the sensitive part of the conventional vibrating string type precision water level gauge is poor in sealing performance and easy to damage and a water inlet hole is easy to block are solved.