A segment-type ring burst test apparatus for evaluating the mechanical properties of a composite pressure vessel and a design method thereof are presented. A segment-type ring burst test apparatus for evaluating mechanical properties of a composite material pressure vessel according to an embodiment includes: a ring burst apparatus consisting of a vertical column, a segment, a lower plate, and PTFE based on the specifications of a composite ring specimen; A structural system in which the compressive load transmitted from the universal testing machine is transmitted in the radial direction of the cylindrical specimen through vertical columns and segments, and the ratio of the transmitted load varies according to the contact angle between the two parts; When the vertical column receives a compressive load due to the contact angle between the vertical column and the segment, the segment is displaced in the radial direction, and through this, the cylindrical specimen can generate tensile force in the circumferential direction; a lower plate that allows the vertical column to move up to 50 mm in the vertical direction and is disposed below the segment to support the segment; and a PTFE layer that relieves pressure non-uniformity between the segment and the ring specimen and reduces the coefficient of friction, and enables a mechanical property test considering the contact angle between the vertical column and the segment according to the specifications of the ring-shaped specimen. have.
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