Test instrument grounding detection warning device

The invention discloses a test instrument grounding detection warning device which comprises a box. A control panel is arranged in the box, a power connection port and a power switch which are electrically connected are arranged on the control panel, a grounding detection module electrically connected with the power switch, a grounding lead-in conductor connected to the input end of the grounding detection module, and warning device bodies connected to the output end of the grounding detection module are further arranged on the control panel, the grounding detection module is a grounding resistor detection module and comprises an alternating current coupling amplifying circuit and a multivibrator circuit, the grounding lead-in conductor is electrically connected with the alternating current coupling amplifying circuit of the grounding detection module, and the warning device bodies are electrically connected with the multivibrator circuit of the grounding detection module. The test instrument grounding detection warning device is simple in detection module circuit structure, high in sensitivity and accuracy, compact in overall structure, convenient to carry and suitable for rapidly detecting various electrical devices and test instruments in power construction and installation.