Ergonomic office chair with self-adaptive backrest

The utility model relates to the technical field of office chairs, in particular to an ergonomic office chair with a self-adaptive backrest, which comprises a backrest support body, a backrest body, and a first connecting component and a second connecting component which are connected with the backrest support body and the backrest body, the first connecting assembly is used for enabling the backrest body to rotate up and down relative to the backrest supporting body; the second connecting assembly comprises a connecting rod, a rod body of the connecting rod penetrates through the adjusting hole of the backrest supporting body, and the first axial end of the connecting rod is hinged to the backrest body; the baffle is connected with the second axial end of the connecting rod; the first limiting piece is connected with the connecting rod in a sleeving manner and is in contact connection with the back surface of the backrest supporting body. Through the arrangement of the first connecting assembly and the secon