Parcels sent on Double 11 hit a record 346 million units, the State Post Bureau said on Tuesday.
The number jumped 73 percent on last year's shopping festival, which ran from Nov 11 to Nov 16.
The daily peak dipped on Nov 13, with 65.17 million packages, but it was still up 85 percent year-on-year.
No parcel pileups were reported this year, as couriers have streamlined operations and added personnel.
Double 11, also known as Singles' Day, has evolved into the nation's largest shopping spree and major e-commerce players offered steep discounts.
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