During her first season on the LPGA Tour, Kim won three tournaments to earn the Tour's Rookie of the Year award.
She reached 30-under par in the Thornberry Creek LPGA Classic.
"I would never (think) about it when I was young, about the (LPGA) record", Kim said. "I did today, so I'm very happy with another good round". Kim won the 2016 Founders Cup at 27 under, while Sorenstam won the 2001 Standard Register Ping at 27 under, the tournament where the Swede shot 59.
"I just want to keep challenging myself and what I can do", she said. After that I really wanted the record for four days.
In the final round, Kim will be trying to break the 72-hole record of 27 under that she shares with Sorenstam.
After a blemish-free third round, the 25-year-old followed up with another faultless day, mixing 11 pars with seven birdies.
Liu, seeking her first LPGA win, rolled in a 15-foot eagle putt at the par-five third that she said "kind of got me going". "She had a heck of a week and I'm really excited for her".
Kim tied the 54-hole record but another low round on Sunday allowed Kim to beat her own record and also to surpass Sorenstam's. She's a great player.
She was ranked as high as number eight in the world past year after her win in Mexico and has struggled for much of 2018. "She just kept the foot down". I hit a lot of greens.
The 72-hole score of 31 under par was not the only an achievement on the LPGA Tour. Sam Saunders lost out with bogeys on the 16th and 17th holes to miss by one. Then, she added three more in the front nine alone, raising expectations that she may be able to surpass the Tour's 72-hole record held by herself and Annika Sorenstam of Sweden. Kim earned her full time status card on the LPGA Tour after finishing tied for ninth at the 2014 LPGA Qualifying Tournament.
Kim began the final round with an eight-shot lead and played magnificent golf all day. Kim, who had a 63 on Thursday and a 65 on Friday, got rolling with an eagle on No. 3 and added six birdies.
Aditi had a total of five birdies, two bogeys and a double in her 71.
Ciganda, 10-under through 17 holes, closed with a disappointing double bogey at 18, where her second shot disappeared in dense undergrowth near the green.
Kim, who made her LPGA debut in 2015, started by making four birdies on the first nine holes. "But before this week even I heard that". "Lots of birdies; lots of good shots".
"When I came they told me that you have to shot a low score here, so I tried my best, tried to fire at all the pins and make as many putts as I could", said Ciganda.
Kim notched her seventh LPGA victory and her first since the Lorena Ochoa Match Play in Mexico previous year.