"In order to gain favour and protection from the Beijing authorities, the Nationalist government has launched an all-out purge and cleansing against the former... administration," Mr Chen's office said on Wednesday.
The KMT party accused Mr Chen of failing to "set an example" as a national leader.
The court date follows more than two months of pre-trial hearings. If found guilty, Mr Chen could spend the rest of his life in prison.
Taiwan has been ruled separately from China since the end of the Chinese civil war in 1949, when the defeated Kuomintang retreated to Taiwan to create a self-governing entity.
But Beijing sees the island as a breakaway province which should be reunified with the mainland, by force if necessary.
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