A portable minimally invasive surgical mechanical arm with multi-degree of freedom comprising a blade part, a blade joint assembly, a shaft and a handle; wherein the blade part is installed at one end of the shaft by the blade joint assembly, and the handle is installed at the other end of the shaft; the shaft comprises a plurality of controlling wires and a controlling wire joint assembly at the other end of the shaft; the controlling wire joint assembly and the blade joint assembly are connected by the plurality of controlling wires; wherein the handle comprises a grip part comprising a grip portion and an axle part, wherein the grip portion is used for holding; a handle joint assembly which is used to movably connect the axle part; and a controlling mechanism connecting with the axle part and the controlling wire joint assembly, and used for transferring the movement of the grip part to the controlling wire joint assembly; the portable minimally invasive surgical mechanical arm being characterized in that the controlling mechanism comprises a first axis and a second axis that are mutually perpendicular to each other, and allows the axle part to rotate around the first axis and the second axis respectively, wherein the first axis coincides with an axis of the axle part and the second axis is perpendicular to the shaft; and and the controlling mechanism comprising a four-link mechanism; wherein the four-link mechanism comprises an input piece, two push rods and an output piece, and the two push rods are connected with the input piece and the output piece, the input piece is configured for receiving movements of the axle part and the output piece is a part of the controlling wire joint assembly. wherein the blade part is installed at one end of the shaft by the blade joint assembly, and the handle is installed at the other end of the shaft; the shaft comprises a plurality of controlling wires and a controlling wire joint assembly at the other end of the shaft; the controlling wire joint assembly and the blade joint assembly are connected by the plurality of controlling wires; wherein the handle comprises a grip part comprising a grip portion and an axle part, wherein the grip portion is used for holding; a handle joint assembly which is used to movably connect the axle part; and a controlling mechanism connecting with the axle part and the controlling wire joint assembly, and used for transferring the movement of the grip part to the controlling wire joint assembly; the portable minimally invasive surgical mechanical arm being characterized in that the controlling mechanism comprises a first axis and a second axis that are mutually perpendicular to each other, and allows the axle part to rotate around the first axis and the second axis respectively, wherein the first axis coincides with an axis of the axle part and the second axis is perpendicular to the shaft; and and the controlling mechanism comprising a four-link mechanism; wherein the four-link mechanism comprises an input piece, two push rods and an output piece, and the two push rods are connected with the input piece and the output piece, the input piece is configured for receiving movements of the axle part and the output piece is a part of the controlling wire joint assembly.