The Book of Songs:
It is China's first collection of poems, which collected 305 poems from the early Western Zhou Dynasty to the mid-Spring and Autumn Period, about 1046 BC to 500 BC.
Vedas:
Vedas: the meaning of knowledge and learning. * * * It is divided into four parts, Rigveda, Ramaveda, Yelveda and Avina Veda. It was written in the Vedic period of India, using a language older than Indian Sanskrit, and was created by the Indian people collectively. Among them, Rigveda
Homer's epic:
It was probably compiled by Homer in the 9th century BC or at the latest in the 8th century BC, and the full version appeared in the 6th century BC after the invention of the Greek alphabet.
So I think Rigveda in India is the earliest poem in the world.