A fixing device for blood vessel suturing comprises a connecting rod, a first clamping member, a second clamping member, a first extension tube and a second extension tube. One end of the first clamping member is disposed on the connecting rod, and the other end of the first clamping member has a first clamping head. One end of the second clamping member is disposed on the connecting rod, and the other end of the second clamping member has a second clamping head. The first extension tube is disposed on an inner side of the first clamping head. The second extension tube is disposed on an inner side of the second clamping head and opposite to the first extension tube, wherein the relative positions of the first extension tube and the second extension tube are adjustable.一種血管縫合的固定裝置，包括一連桿、一第一夾持件、一第二夾持件、一第一延伸管件以及一第二延伸管件。第一夾持件的一端設置於連桿上，第一夾持件的另一端具有一第一夾頭。第二夾持件的一端設置於連桿上，第二夾持件的另一端具有一第二夾頭。第一延伸管件設置於第一夾頭的一內側上。第二延伸管件設置於第二夾頭的一內側上並與第一延伸管件相對，其中第一延伸管件與第二延伸管件的相對位置可調整。
