Direct current triggering power supply clamp ESD (electronic static discharge) protection circuit

The invention relates to the field of integrated circuit chip ESD protection, in particular to a direct current triggering power supply clamp ESD (electronic static discharge) protection circuit. The direct current triggering power supply clamp ESD protection circuit comprises a discharge transistor M and a direct current voltage detection circuit, wherein the discharge transistor M is used for discharging static charges, and the direct current voltage detection circuit is connected between a power supply wire V and a ground wire V , is connected with the discharge transistor M and is used for judging whether the pulse on the power supply wire VDD is the static discharge pulse or not; if so, the corresponding signals are sent to the discharge transistor M . The direct current triggering power supply clamp ESD protection circuit has the advantages that in the normal work process, the electricity leakage is little, when ESD events occur, the triggering voltage and the maintenance voltage can fall in the range of an ESD protection window in the advanced process, and the effective ESD protection is formed.