A balance vehicle, comprising: a first vehicle frame and a second vehicle frame rotatable relative to each other; a rotating mechanism disposed between the first vehicle frame and the second vehicle frame to rotatably connect the first vehicle frame to the second vehicle frame; a rotation stop member fixed on at least one of two opposite sides of the first vehicle frame and the second vehicle frame; and a function extension member rotatably connected to the rotation stop member; wherein the function extension member is connected in a stop connection manner to the rotation stop member of the first vehicle frame and/or the second vehicle frame to limit a rotation angle of the function extension member relative to the first vehicle frame and/or the second vehicle frame, characterized in that each of the two opposite sides of the first vehicle frame and the second vehicle frame is respectively fixed with one rotation stop member; wherein a first groove is defined on the rotation stop member of the first vehicle frame, the function extension member comprises a first stop bar disposed at a side facing the rotation stop member of the first vehicle frame, the first stop bar of the function extension member is embedded in the first groove and is rotatable in the first groove with respect to the first vehicle frame as the function extension member is mounted on the rotation stop member; a second groove is defined on the rotation stop member of the second vehicle frame, the function extension member comprises a second stop bar disposed at a side facing the rotation stop member of the second vehicle frame, the second stop bar of the function extension member is embedded in the second groove and is rotatable in the second groove with respect to the second vehicle frame as the function extension member is mounted on the rotation stop member. a first vehicle frame and a second vehicle frame rotatable relative to each other; a rotating mechanism disposed between the first vehicle frame and the second vehicle frame to rotatably connect the first vehicle frame to the second vehicle frame; a rotation stop member fixed on at least one of two opposite sides of the first vehicle frame and the second vehicle frame; and a function extension member rotatably connected to the rotation stop member; wherein the function extension member is connected in a stop connection manner to the rotation stop member of the first vehicle frame and/or the second vehicle frame to limit a rotation angle of the function extension member relative to the first vehicle frame and/or the second vehicle frame, characterized in that each of the two opposite sides of the first vehicle frame and the second vehicle frame is respectively fixed with one rotation stop member; wherein a first groove is defined on the rotation stop member of the first vehicle frame, the function extension member comprises a first stop bar disposed at a side facing the rotation stop member of the first vehicle frame, the first stop bar of the function extension member is embedded in the first groove and is rotatable in the first groove with respect to the first vehicle frame as the function extension member is mounted on the rotation stop member; a second groove is defined on the rotation stop member of the second vehicle frame, the function extension member comprises a second stop bar disposed at a side facing the rotation stop member of the second vehicle frame, the second stop bar of the function extension member is embedded in the second groove and is rotatable in the second groove with respect to the second vehicle frame as the function extension member is mounted on the rotation stop member.