Provided is a residual current type electrical fire hazard monitoring detector, comprising a mainboard, a display panel and a power strip. The power strip is in connection with the mainboard through a power line; the mainboard is in connection with the display panel through a signal line. The mainboard comprises a one-chip microcomputer chip, an acoustic alarm circuit, an input control circuit, an output control circuit, a communication circuit and an alarm output circuit; the one-chip microcomputer chip is respectively in connection with other circuits. The display panel comprises an indicating lamp circuit and a nixie tube display circuit in mutual connection; the one-chip microcomputer chip receives correlative input alarm signals through the input control circuit, outputs correlative alarm signals through the acoustic alarm circuit after analysis, comparison and determination, and outputs various control signals through the output control circuit to be in connection with gas steel cylinders, valves, ventilation equipment and other alarm equipment.