The invention relates to a combined necklace in variable connection, and the combined necklace is composed of a necklace and a pendant, wherein the necklace comprises four chain lines; three chain lines are connected into one linearly connected chain line through a baldric ring and a connection ring in an end-to-end connecting manner; a fourth chain line is connected with the baldric ring so as to form a T-shaped necklace together with the linearly connected chain line as well as the baldric ring; the T-shaped necklace is connected with connection rings in different sizes and a hook, thereby being connected in different manners; a pendant A is in a tubular column shape and a pendant B is in a spherical column shape; side walls are all of a fence-type hollowed-out structure; the end of the T-shaped chain line passes through the pendant A, the pendant B or the pendant combined by A and B from hollowed-out parts at the sides of the pendant; and the T-shaped chain line in different interpenetrating connections can be connected to the pendant in different combination forms, thereby achieving the effects that the combined necklace is worn in different manners and has variable functions.