A deformable crutch, comprising a hand-held part, a seat part, and a support part arranged such that the hand-held part and the seat part are rotatable connected, and the seat part and the support part are rotatable connected, and further comprising a first lock device for locking a rotation angle between the hand-held part and the seat part, and a second lock device for locking a rotation angle between the seat part and the support part, wherein the hand-held part comprises a handlebar, a first connecting rod, a second connecting rod, and a first cross rod, and one end of the first connecting rod and one end of the second connecting rod are respectively connected with two ends of the handlebar, and the other end of the first connecting rod and the other end of the second connecting rod are respectively connected with two ends of the first cross rod, wherein the seat part comprises a third connecting rod, a fourth connecting rod and a second cross rod, and one end of the third connecting rod and one end of the fourth connecting rod are respectively rotatably connected with the first cross rod, and the other end of the third connecting rod and the other end of the fourth connecting rod are respectively connected with two ends of the second cross rod, wherein the support part comprises a first support rod, and one end of the first support rod is rotatably connected with the second cross rod, and wherein the crutch it- further comprises a second support rod and a third support rod, characterized in that one end of the second support rod and one end of the third support rod are respectively hinged with one end of the first support rod far from the second cross rod, and - the other end of the second support rod and the other end of the third support rod are respectively connected with the second cross rod such that they can be removed, and - the first connecting rod is provided with a first blind hole, the second connecting rod is provided with a second blind hole, and the other end of the second support rod and the other end of the third support rod are respectively inserted into and matched with the first blind hole and the second blind hole. wherein the hand-held part comprises a handlebar, a first connecting rod, a second connecting rod, and a first cross rod, and one end of the first connecting rod and one end of the second connecting rod are respectively connected with two ends of the handlebar, and the other end of the first connecting rod and the other end of the second connecting rod are respectively connected with two ends of the first cross rod, wherein the seat part comprises a third connecting rod, a fourth connecting rod and a second cross rod, and one end of the third connecting rod and one end of the fourth connecting rod are respectively rotatably connected with the first cross rod, and the other end of the third connecting rod and the other end of the fourth connecting rod are respectively connected with two ends of the second cross rod, wherein the support part comprises a first support rod, and one end of the first support rod is rotatably connected with the second cross rod, and wherein the crutch it- further comprises a second support rod and a third support rod, characterized in that one end of the second support rod and one end of the third support rod are respectively hinged with one end of the first support rod far from the second cross rod, and - the other end of the second support rod and the other end of the third support rod are respectively connected with the second cross rod such that they can be removed, and - the first connecting rod is provided with a first blind hole, the second connecting rod is provided with a second blind hole, and the other end of the second support rod and the other end of the third support rod are respectively inserted into and matched with the first blind hole and the second blind hole. - the other end of the second support rod and the other end of the third support rod are respectively connected with the second cross rod such that they can be removed, and - the first connecting rod is provided with a first blind hole, the second connecting rod is provided with a second blind hole, and the other end of the second support rod and the other end of the third support rod are respectively inserted into and matched with the first blind hole and the second blind hole.