External fixation device for knee-joint reconstruction

The invention discloses an external fixation device for knee-joint reconstruction. The external fixation device comprises a vertically arranged frame plate, wherein at least two lower fixing needle clamps penetrating through the frame plate by taking a transverse direction as a threading direction are arranged on the frame plate; a lower supporting plate is fixedly connected to the lower end of the frame plate; a lower fixation column parallel to the frame plate is connected onto the lower supporting plate; an upper arc rack is hinged onto the frame plate and comprises an arc-shaped inner joint surface; at least two upper fixing needle clamps taking the transverse direction as the threading direction are symmetrically arranged on the upper arc rack; an upper fixation column which extends downwards and is opposite to the lower fixation column is fixedly connected onto the upper arc rack; and an adjustable pull rod with an adjustable height is hinged between the lower fixation column andthe upper fixation colum