A fastening mechanism, the fastening mechanism being configured to connect a first member to a second member wherein the fastening mechanism comprises: a clamp member having an enclosure for enclosing the first member, and engagement sheets extending from two side edges of the enclosure, each of the engagement sheets are provided with a first engagement portion, and each of the engagement sheets of the clamp member includes a first portion extending from the side edge of the enclosure, wherein a pair of the first portions of the engagement sheets respectively extend from the side edges of the enclosure and are gradually close to each other, and a second portion extends from each first portion, wherein a pair of second portions extending from the first portions are parallel to each other; a locking member having slots, the engagement sheets of the clamp member being configured to be able to be inserted through the slots, wherein the first portion is configured to be inserted into the slot of the locking member, and the first engagement portion is arranged on the second portion; and an actuating and tensioning means comprising: a body portion provided with a second engagement portion engaged with the first engagement portion of the engagement sheets, and a force application mechanism attached to the body portion for applying a force on the locking member to shift a relative position between the locking member and the clamp member, characterized in that the locking member has a flared portion, the flared portion faces toward the enclosure of the clamp member, and an inner wall surface of the flared portion engages with the first portions of the engagement sheet. a clamp member having an enclosure for enclosing the first member, and engagement sheets extending from two side edges of the enclosure, each of the engagement sheets are provided with a first engagement portion, and each of the engagement sheets of the clamp member includes a first portion extending from the side edge of the enclosure, wherein a pair of the first portions of the engagement sheets respectively extend from the side edges of the enclosure and are gradually close to each other, and a second portion extends from each first portion, wherein a pair of second portions extending from the first portions are parallel to each other; a locking member having slots, the engagement sheets of the clamp member being configured to be able to be inserted through the slots, wherein the first portion is configured to be inserted into the slot of the locking member, and the first engagement portion is arranged on the second portion; and an actuating and tensioning means comprising: a body portion provided with a second engagement portion engaged with the first engagement portion of the engagement sheets, and a force application mechanism attached to the body portion for applying a force on the locking member to shift a relative position between the locking member and the clamp member, characterized in that the locking member has a flared portion, the flared portion faces toward the enclosure of the clamp member, and an inner wall surface of the flared portion engages with the first portions of the engagement sheet. a body portion provided with a second engagement portion engaged with the first engagement portion of the engagement sheets, and a force application mechanism attached to the body portion for applying a force on the locking member to shift a relative position between the locking member and the clamp member, characterized in that the locking member has a flared portion, the flared portion faces toward the enclosure of the clamp member, and an inner wall surface of the flared portion engages with the first portions of the engagement sheet.