Heather, 45, who lost part of her left leg in a motorcycle accident in 1993, seemed thrilled with her win as she said: "Thanks New Zealand for a great race, you did a great job. Thank you," upon collecting her medal.
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The former model is ranked number 28 in the world but won the silver medal after recording a time of 2 minutes 9.09 seconds at Coronet Peak in Queenstown.
The top prize went to Melanie Schwartz of Canada who recorded a time of 1.59.79.
In 2012, the star exclusively spoke to HELLO! Magazine about her pride at being chosen to race for the British Disabled Ski Team and her dreams of competing at the London Olympics.