Integrated circuit chip and protection method and device thereof

The invention provides an integrated circuit chip and a protection method and device thereof. The protection method comprises the steps that when the integrated circuit chip starts working for the first time, the operation frequency of the integrated circuit chip is detected to act as the initial operation frequency of the integrated circuit chip; the operation frequency of the integrated circuitchip is detected in real time to act as the current operation frequency of the integrated circuit chip; whether the integrated circuit chip stops working because of deterioration is judged according to the current operation frequency of the integrated circuit chip detected in real time, the initial operation frequency and the preset deterioration factor; and when the integrated circuit chip is determined to stop working because of deterioration, a deterioration alarm signal is outputted and operation of the integrated circuit chip is stopped. With application of the scheme, the condition of system breakdown caused by