China is banning officials from using public funds to buy mooncakes, the pastries offered as gifts during the Mid-Autumn (or Moon) Festival.
The ban is part of President Xi Jinping's drive to beat corruption and restore faith in the ruling Communist Party.
Every violation would be punished, the government statement said.
Mooncakes are traditionally filled with salted egg yolk and sweet lotus paste, and symbolise the moon.
The government statement also banned the use of public money to pay for luxurious feasts and what it called high-end entertainments during the festival period.
Mr Xi has described fighting corruption as a priority, and several high-profile officials have been sacked in recent months.
This year, the festival falls on 19 September.