The invention discloses a GNSS double lifting rope segment building construction tower crane for accurately locating the lifting hook position. The GNSS double lifting rope segment building construction tower crane comprises a tower arm, a first lifting rope segment, a second lifting rope segment, a movable pulley which is arranged between the first lifting rope segment and the second lifting ropesegment and a lifting hook which is arranged at the tail end of the second lifting rope segment. A building construction tower crane is cooperated with a lifting fixed point lofting auxiliary system.The lifting fixed point lofting auxiliary system comprises a GNSS reference station and a monitoring device. The building construction tower crane also comprises a wind speed measuring device and a wind acceleration measuring device which are arranged on the tower arm and used for measuring the wind speed and the wind acceleration of the tower arm; and a GNSS moving station which is arranged on the movable pulley. The GNSS moving station receives a navigation satellite differential correction signal from the GNSS reference station, acquires the plane coordinate information and the elevation information of the GNSS moving station and transmits the plane coordinate information and the elevation information to the monitoring device. The monitoring device calculates the elevation of the lifting hook according to the wind speed and the wind acceleration of the tower arm and the tangential speed and the normal braking acceleration of the moving vehicle of the building construction tower crane.