The invention discloses a ground type external-circulation double-layer curved-face 
curtain wall and an installation technology thereof. The ground type external-circulation double-layer curved-face 
curtain wall comprises a curved-face inner 
curtain wall body and a curved-face outer curtain wall body, wherein the curved-face inner curtain wall body is installed on a main body structure, and the curved-face outer curtain wall body is located on the outer side of the inner curtain wall body and fixed to the main body structure through an outer 
supporting system penetrating through the inner curtain wall body. An inner curtain wall unit body is installed between the upper and lower adjacent floors of the main body structure, the bottom of the inner curtain wall unit body is supported on a concentric rotary bottom adjusting 
assembly installed at the top of the lower floor, the top of the inner curtain wall unit body is fixed to a concentric rotary top adjusting 
assembly installed at the bottom of the 
upper floor, and the concentric rotary bottom adjusting 
assembly and the concentric rotary top adjusting assembly adjust the inclination and upward-facing angle, towards the indoor space,of the inner curtain wall unit body through a concentric rotary mode. According to the ground type external-circulation double-layer curved-face curtain wall and the installation technology thereof, the curtain wall structure is simple, the energy-saving effect of double-layer curtain-wall external circulation is achieved, the appearance visual demand of a smooth curved face is further met, the 
structural safety performance is good, the installation technology is easy to implement and not tedious, and the construction efficiency is high.