The invention provides a digital composite functional high-voltage electroscope used for power transmission line electrical inspection work, and belongs to the field of electrical tools and appliances. The digital composite functional high-voltage electroscope comprises an insulating rod, a detection instrument and a handheld rod. The insulating rod is composed of an insulating rod 3 and an insulating rod 4. The detection instrument is composed of a shell 7, a built-in circuit, a knob switch 8, a changeover switch 10, a magnetic field sensor, a sound alerter 16, a high-brightness LED indication lamp 9, a digital display screen 6, an adjustable knob 14 of a current-limiting resistor 2, a laser transmitter 16, a focus lens 17, a connector 13 and a laser switch 18. The handheld rod is composed of a handheld position-limiting ring 11, a storage battery 5 and a conductive film 12. Contact electrical inspection and remote noncontact electrical inspection can be performed simultaneously, induced voltage and working voltage of a maintenance line can be distinguished, and the voltage value of the line can be estimated and displayed. The digital composite functional high-voltage electroscope can be used for different voltage levels of line electrical inspection work via a range conversion knob. The electroscope has advantages of being reliable in electrical inspection, safe in operation, digitalized and multipurpose.