Abstract: A height-adjustable back correction belt includes a waistband, shoulder straps are disposed on two sides of the waistband, and a strap sleeve is mounted between the two shoulder straps in a penetrating manner. A fixed portion is disposed in a middle of an upper portion of the waistband, a sliding portion is disposed on a rear side of the strap sleeve, the sliding portion is located above the fixed portion, a fixing member is extended through and cooperatively engaged with the fixed portion and a sliding groove of the sliding portion to form a lifting fit structure, and a limiting assembly is disposed between the fixing member and the sliding groove. A waist compression strap is disposed on a middle vertical support strap, and the waist compression strap is pulled to shorten and tighten the shoulder straps backward. The limiting assembly achieves precise locking after height adjustment.