The women's 400 metres event at the 2017 Summer Universiade was held on 23, 24 and 25 August at the Taipei Municipal Stadium.
Qualification: First 4 in each heat (Q) and next 4 fastest (q) qualified for the semifinals.[1]
Qualification: First 2 in each heat (Q) and the next 2 fastest (q) qualified for the final.[2]
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