Intermediate-frequency heater with anti-scratching device

The utility model relates to an intermediate-frequency heater with an anti-scratching device. The intermediate-frequency heater is characterized in that the intermediate-frequency heater comprises an intermediate-frequency heater body (1), an inner cylinder (2) is disposed in the intermediate-frequency heater body (1), an intermediate-frequency heating coil (3) is disposed in the inner cylinder (2), a copper pipe (4) is fixed into the intermediate-frequency heating coil (3), the top outer wall of the copper pipe (4) is provided with a strip-shaped notch (5) formed in the radial direction of the copper pipe (4), a gap is formed in the cross section of the copper pipe (4), and the strip-shaped notch (5) is filled with ceramic (6). The intermediate-frequency heater with the anti-scratching device cannot influence an actual running effect of a heating device and also enhance strength of an inner cavity of the heating device, and can greatly reduce faults which are generated by the heating device and caused by damage of the inner cavity; and, for example, for water leakage, arcing, over-the-ground and the like, a user does not need to specially add an extra device, and large benefits for equipment maintenance and later cost.