A 10 kilovolt electric wire terminal head installation device is timesaving and laborsaving, allows an electric wire bending radian to completely match with an electric wire terminal adjusting wedge, and can completely mount an electric wire terminal sleeve onto an electric wire terminal adjusting wedge assigned position; the 10 kilovolt electric wire terminal head installation device comprises a frame having an electric wire moulding mechanism, a terminal head sleeve mechanism and an electric wire tail fixing mechanism; the electric wire moulding mechanism comprises a U-type fixed member, a moulding cylinder, a moulding reversing valve and a moulding air pump; a cylinder rod of the moulding cylinder points to the U-type fixed member opening, and a wire pressing wheel is arranged on the top of the moulding cylinder rod; the terminal head sleeve mechanism comprises a fixed block, a sleeve cylinder, a sleeve reversing valve and a sleeve air pump; the fixed block is provided with an arc-shaped fixed port; the sleeve cylinder rod points to the arc-shaped fixed port; a pressing block is arranged on the top surface of the sleeve cylinder rod; the electric wire tail fixing mechanism comprises a lever hinged to the frame top surface, an upper press module arranged on the lever body, and a lower press module arranged on the frame top surface.