The utility model relates to a turbine deceleration lengthwise split training measurer for stretching two legs and opening hip lengthwise. An exerciser drives a screw rod (3) under a turbine box to rotate through clockwise and counterclockwise rotation of a middle hand wheel (2). A screw rod nut (5) rotating around the screw rod (3) and a sliding sleeve (7) on a linear guide rail (6) move up and down simultaneously, and meanwhile drive a straddle leg supporting plate (8) to move up and down vertically on a combined body fixed on a screw rod nut sliding sleeve. A height pointer (9) points to an upright column with a graduated scale (10). The exerciser and a coach can observe the height from the ground in each training time, and the exerciser can timely adjust physiological load through rotation of the hand wheel (2). A side baffle (13) can effectively control a front leg and a back leg to be respectively in a line at the time of lengthwise split forward and backward. During training, the exerciser pays attention to postures of the body, namely, tightly stretches two tiptoes, raises the head, stretches the chest and erects the waist. According to the turbine deceleration lengthwise split training measurer for stretching the two legs and opening the hip lengthwise, the structure is simple, manufacture is simple and convenient, the turbine deceleration theory is applied to flexibility training so as to conform to the principle of physical training step by step, fear psychology of the exerciser during training is overcome, and confidence of the exerciser is enhanced.