The invention relates to a V-shaped fracture sealing assembly used for a servo hydraulic cylinder. According to the technical scheme, 1 to 3 annular sealing grooves are machined in the middle position of the cylinder face of a piston (2), and bearing annular grooves are symmetrically machined in the portions, close to the positions of the two ends of the piston (2), of the cylinder face. V-shaped fracture combined sealing pieces (3) are embedded in the sealing grooves of the piston (2). V-shaped fracture bearing rings (4) are embedded in the bearing annular grooves of the piston (2). V-shaped fracture sealing pieces (6) in the V-shaped fracture combined sealing pieces (3) are embedded in annular sealing grooves of groove type sealing pieces (5). The V-shaped fracture sealing pieces (6) are seal rings with rectangular sections. A V-shaped fracture is formed in any position of each seal ring. The shape of the V-shaped fracture bearing rings (4) is the same as the shape of the V-shaped fracture sealing pieces (6). When the V-shaped fracture bearing rings (4) and the V-shaped fracture sealing pieces (6) are installed, the protruding faces of the V-shaped fractures are closely attached to the concave faces of the V-shaped fractures. The V-shaped fracture sealing assembly has the beneficial effects of being simple in structure, convenient to disassemble, assemble and maintain, small in friction resistance, long in service life and good in sealing performance.