"奠酒祭神仪式" can be translated as "the ritual of pouring libations to honor/appease the gods" or more concisely as "the libation-pouring ritual for gods."
Here, "libation" refers to the act of pouring a liquid (usually wine) as an offering to a deity, and "ritual" denotes a set of fixed actions and words performed in a ceremony. The phrase accurately captures the essence of offering wine or another liquid to gods as part of a religious or ceremonial practice.