Provided is an inner-support spring suspended wire segment model vibration measurement test apparatus which comprises a segment model and supporting columns fixedly installed on both sides in a wind tunnel test section. Top beams and bottoms are installed between the supporting columns at the same side and are capable of moving up and down along the supporting columns to be adjusted in positions. Two vertical position-adjustable upright springs are installed between the top beam and the corresponding bottom beam. A horizontally-arranged suspension cross bar is installed on the upright spring. Each of both ends of the segment model is connected with an end plate. Each end plates is connected with the adjacent suspension cross bar through a connecting piece. Both sides of each connecting piece are connected with two supporting columns at the same side through horizontal springs. The segment model is connected with the suspension cross bars through the end plates and the connecting pieces so as to be capable of freely and translationally moving in the vertical direction and freely rotating about a inertia axis of the segment model. In addition, the connecting pieces are connected with the supporting columns through the horizontal springs such that the segment model may freely and translationally move in the horizontal direction.