Caitlin Foord has delivered a 29-minute hat-trick to power the Matildas to an electric 7-0 triumph over Taiwan in their Olympic qualifier in Sydney.

With Sam Kerr starting off the bench on Friday, Foord scored in the ninth, 24th and 38th minutes to show why she recently signed with Arsenal.

Defender Stephanie Catley, winger Hayley Raso, substitutes Katrina Gorry and Kerr also netted to ensure Australia move to the top of their pool.

Despite Taiwan fielding a back-five, a dynamic Australia attack were able to create a whopping 29 chances in the wet conditions at Campbelltown Stadium.

And the result was one of their more dangerous displays in recent memory, setting the tone for the rest of their qualifying matches.

They next face Thailand on Monday before meeting China on Thursday.

The comprehensive win came hours after China put six past Thailand in their first pool match of the double-header.

The Matildas need to finish in the top two of their pool to advance to the final stage of qualifying next month.

Australia coach Ante Milicic was proud of his team's ruthlessness in spite of Taiwan's defensive intent.

"They went away from their usual set-up. With a 5-4-1 block, it's easy to get frustrated," Milicic said post-game.

"I was pleased that we went in at halftime with a good lead, but at the same time we didn't stop. Second half we wanted to build on that, and we did.

"So overall, very pleased."

Milicic made six changes to the side that last played in November, including Kerr being utilised off the bench.

The home side were dominant from the outset, with their midfield in particular putting the ball on the platter for the in-form Foord.

Her treble began with a simple one-two with the recalled Kyah Simon early in the contest, and then a no-look through ball from Emily Van Egmond soon after.

Van Egmond again assisted for Catley seven minutes later, with the left-back chipping over the advancing goalkeeper for her third international goal.

Foord completed her second international hat-trick, courtesy of another Van Egmond assist, for a four-goal advantage just before the break.

The goals continued to flow in the second period, with Raso scoring on the counter in the 54th minute for her fourth international goal.

Not content with their lead, Kerr, who has been battling a quad strain, was introduced on the hour-mark, and had an instant impact with a goal on the counter.

Gorry completed the rout with the Matildas' seventh goal in added time.