The invention discloses an aging fault detection sensor based on a protective tape, comprising a delay unit, a stability detector, an output latch, and a first inverter. The delay unit is used for controlling on-off of the aging fault detection sensor. When the delay unit is opened, a delayed clock signal GB is generated. When the delay unit is closed, the aging fault detection sensor is in an anti-aging state. The stability detector receives the delayed clock signal GB, a reverse signal nclk of an original clock signal, and a CL signal of a combinational logic circuit. The delayed clock signal GB and the reverse signal nclk of the original clock signal form protective tape time. The stability detector detects whether the signal CL of the combinational logic circuit jumps within the protective tape time, and outputs a jump signal to the output latch. The output latch is used for latching the received jump signal and sending out an alarm signal. The aging fault detection sensor has the advantages of simple structure, low power consumption, aging resistance and high reliability, can predict the natural aging of the circuit, and can meet the requirement of chips for low power consumption.