Circuit security testable design method capable of detecting inactive hardware Trojan horse and detecting method of hardware Trojan horse

The invention relates to a circuit security testable design method capable of detecting an inactive hardware Trojan horse and a detecting method for the hardware Trojan horse. Firstly, the design and the verification on an original circuit are completed. Secondly, a security testing mode is added for the circuit, the clock frequency under the security testing mode is great less than the working frequency of the circuit, and work such as corresponding compositing, locating and wiring, timing sequence analyzing and designing is finished. In the chip testing process, the security testing mode is in use, and by means of a security testing clock with the using frequency which is great less than a functional clock, the dynamic power consumption during whole circuit running is lowered, so that the proportion of the static power consumption of the hardware Trojan horse in an idle state on the whole circuit power consumption is increased, and detecting on the hardware Trojan horse which is in a sleep mode is achieved.