A tower segment, comprising: an annular body, wherein the annular body has two opposite end faces in an axial direction of the annular body, the annular body is formed by assembling a plurality of tower pieces, wherein each two tower pieces are connected by a connecting member, wherein the connecting member comprises a first connection piece and a second connection piece detachably connected to each other and wherein a side from the first connecting piece away from the second connecting piece is fixedly connected to an inner annular face and an outer annular face of one of the two adjacent tower pieces, and a side of the second connecting piece away from the first connecting piece is fixedly connected to an inner annular face and an outer annular face of the other of the two adjacent tower pieces, characterized in that an accommodating groove extending in the axial direction is provided between each two adjacent tower pieces, the accommodating groove is located between the two end faces and is spaced apart from the two end faces by a predetermined distance greater than 0, and the accommodating groove runs through a wall portion of the annular body in a thickness direction of the annular body; and wherein the accommodating groove is formed by an enclosure defined by a first recess and a second recess, the first recess is located in one of the two adjacent tower pieces, the second recess is located in the other of the two adjacent tower pieces, and the first recess and the second recess have the same structure and are symmetrically arranged, the first connecting piece and the second connecting piece are arranged in the accommodating groove. an annular body, wherein the annular body has two opposite end faces in an axial direction of the annular body, the annular body is formed by assembling a plurality of tower pieces, wherein each two tower pieces are connected by a connecting member, wherein the connecting member comprises a first connection piece and a second connection piece detachably connected to each other and wherein a side from the first connecting piece away from the second connecting piece is fixedly connected to an inner annular face and an outer annular face of one of the two adjacent tower pieces, and a side of the second connecting piece away from the first connecting piece is fixedly connected to an inner annular face and an outer annular face of the other of the two adjacent tower pieces, characterized in that an accommodating groove extending in the axial direction is provided between each two adjacent tower pieces, the accommodating groove is located between the two end faces and is spaced apart from the two end faces by a predetermined distance greater than 0, and the accommodating groove runs through a wall portion of the annular body in a thickness direction of the annular body; and wherein the accommodating groove is formed by an enclosure defined by a first recess and a second recess, the first recess is located in one of the two adjacent tower pieces, the second recess is located in the other of the two adjacent tower pieces, and the first recess and the second recess have the same structure and are symmetrically arranged, the first connecting piece and the second connecting piece are arranged in the accommodating groove.