The invention relates to a composite interlocking device for power distribution equipment. The composite interlocking device consists of a singlechip, a voltage stabilizing circuit module and a terminal strip, and is characterized in that an optical isolation interlocking signal acquisition circuit consisting of a resistor, an optical isolator and a voltage stabilizing tube is arranged between the singlechip and an external interlocking node introduction terminal of the terminal strip; a relay driving circuit consisting of an optical isolator, a resistor, a triode and a relay coil is further connected to the singlechip. A passive interlocking node can be accessed through a cable, and an interlocking signal can be received through 2.4G wireless communication. Meanwhile, an abnormity alarm signal is transmitted to a power distribution automation terminal through 2.4G wireless communication, thereby realizing remote monitoring of remote loop interlocking information.