The invention provides a use method of an automatic cutting and press mounting terminal machine of a power line and belongs to the field of electronic product processing devices. An intelligent control panel is used for programming, by combining a digital controller, a servo motor is driven to provide materials according to the size, and an electrically controlled multi-channel air valve is drivento control a cutting and wire stripper and terminal press mounting pilers to work simultaneously so as to carry out automatic cutting and press mounting on terminals by stipulating the size of a power line.