Shin finished at 9-under 279 at Royal Liverpool, shaking off windy, rainy conditions to far outdistance her closest competition -- Inbee Park at even-par 288.
Her nine-shot margin of victory easily bested the former of record of four strokes held by Karen Stupples.
It was Shin's second LPGA Tour title in less than a week -- she edged Paula Creamer after a long playoff Monday to win the Kingsmill Championship.
Park carded a 4-over 76 in her second-place finish Sunday, while Creamer claimed third at plus-1 with an even-par 72.
Fourth place went to Mika Miyazato., who registered a 5-over 77, ending the tourney at 2-over.