The present invention provides an adjustable fixing brace comprising a lower leg, a
thigh, a hip joint brace, and knee and hip adjustment parts. The second
serration on the side surface of the
knee joint adjustment part engages with the first
serration of the first connecting part of the lower leg brace. The lower first fixing part has a groove, and the upper second fixing part has a third
serration. The lower end of the third fixing part extends into the groove within the third opening in the middle to push and rotate. The upper end of the locking block of the first pushing part of the limiting component within the second opening engages with the third serration. A
retaining ring in the middle is connected to the second pushing part via a first spring, and a second spring is fitted on the lower part. The
retaining ring compresses the second spring for adjustment. In the hip joint adjustment part, the
thigh brace connecting part has a buckle, the fourth fixing part of the hip brace connects to a support column, and the upper rotating part is fitted onto the support column. One end of the upper rotating part has a fourth serration. The fifth serration on the upper surface of the lower rotating part engages with the fourth serration and can rotate around the support column. A third spring between the fourth fixing part and the upper rotating part lifts the upper rotating part. The upper part of the support column is fitted with the adjustment part and fixed to the first screw hole of the support column by screws.