Hand telephone line inspection instrument

The utility model provides a hand telephone line inspection instrument, which comprises a power circuit, a switch, a control circuit, a line break discrimination circuit, a resistor discrimination circuit, an indicating circuit, and a telephone, wherein, the power circuit is connected with the telephone or the line break discrimination circuit, and the resistor discrimination circuit by the control of the switch to provide power signals; the line break discrimination circuit and the resistor discrimination circuit are respectively connected with a test end through the control circuit, and output signals of the line break discrimination circuit and the resistor discrimination circuit are connected with the indicating circuit. On the basis of the normal communication, the utility model does not need power. The utility model can be used for discriminating the property of obstacles of the measured telephone line. The utility model has the advantages of simple operation, direct viewing, and low cost.