The utility model discloses a scaffold frame with adjustable, which comprises two bases, the upper surface joint of base has the bearing, the inner wall of bearing is pegged graft and is had spiral shell rasp bar, spiral shell rasp bar goes up threaded connection has the internal thread post, spiral shell rasp bar's fixed surface is connected with first gear, the last fixed surface of base is connected with step motor, step motor's output shaft fixedly connected with second gear, a second gear and a gear engagement. This scaffold frame with adjustable, through the step motor function, it is rotatory to drive spiral shell rasp bar, when spiral shell rasp bar and internal thread post relative rotation for spiral shell rasp bar rises in the internal thread post and contracts, thereby adjuststhe total length of spiral shell rasp bar and internal thread post, and then has reached the effect of adjusting scaffold degree of elevating, through the threaded connection of spiral shell rasp barand internal thread post, thereby turns into linear motion with rotary motion, thereby makes the effect that reaches infinitely variable control when carrying out the altitude mixture control.