An automatic handle assembly for scissors-shearing is a handy device for fixing a scissors to cut tissue, which comprises: a fixture portion including: a fix scissor handle having a proximal end and a distal end, the proximal end equipped with a fix tenon and the distal end equipped with a connection portion a free scissor handle having a distal end and a proximal end coupled to the fix tenon causing the distal end of the free scissor handle and the distal end of the fix scissor handle to pivot to close or open and a pair of fixture elements being mounted on the fix scissor handle and the free scissor handle, and slidably moving along with the fix scissor handle and the free scissor handle for adjustably fixing a scissors a drive unit coupled to the fixture portion to provide reciprocating motion of the free scissor handle to the fix scissor handle and a power unit being removably equipped on the distal end of the fix scissor handle, and coupled to the drive unit to provide power for the reciprocating motion.
