Changmao the ram and Chunzi the doe's "unconventional relationship" have made them popular with the public.
The Yunnan Provincial Wildlife Park in Kunming city will be issuing tickets to the event, the China News Service reports.
The pair were forcibly separated last year but were eventually reunited.
At least 500 tickets at 66 yuan ($10; £6.60) will be issued for their "wedding day", China Daily reports. The animals will be clad in "wedding clothes".