"Dukes of Hazzard" star John Schneider is headed for divorce court ... and it's all his wife's doing.

Elvira Schneider filed legal docs citing irreconcilable differences.  

The couple married in July, 1993. They have 2 adult kids.

Elvira is asking for spousal support.

As for John ... it will be his second divorce. He was previously married to former L.A. news anchor and Miss America Tawny Little.