The utility model discloses a wide-range static balance adjusting device of a large centrifugal machine. The wide-range static balance adjusting device comprises tension rods and a large-mass balancing weight mounted on the tension rods in a sleeved manner, a thread is formed on the periphery of each tension rod, a section, with a thread, on each tension rod is a tension rod screw, a nut sleeve is mounted on each tension rod screw through the corresponding thread in a sleeved manner, the balancing weight is mounted on the nut sleeves in a sleeved manner, a rotating device is arranged between the balancing weight and each nut sleeve and enables the corresponding nut sleeve to freely rotate when the balancing weight is static, a motor is mounted on the balancing weight, and a rotary shaft of the motor is connected with the nut sleeves through transmission devices. The threads with self-locking functions are adopted for driving, so that self-locking requirements in a balance state are met, and centrifugal force load of 2000t can be borne; the motor drives the large-mass balancing weight to realize static balance adjusting, and balance fine-tuning can be realized by inching, so that high-accuracy and continuous adjusting is realized, and the wide-range static balance adjusting device is simple to operate.