The invention belongs to the technical field of engineering blasting and discloses an annular linear energy-accumulation cutter. The annular linear energy-accumulation cutter comprises a restraining shell, explosives, liners and a detonation device, wherein the restraining shell is a columnar pipe; a plurality of semi-circular tubular linear liners are arranged inside the shell; notches of the pipes all face towards and are in contact with the inner wall surface of the shell; the outer walls of each two adjacent semi-circular tubes are in tangent mutually; the length of each tube is the same as the length of the restraining shell, and the axes of each tube and the restraining shell are in parallel; a middle space surrounded by the liners is filled with the explosives and is provided with a detonating fuse; the axis of the middle space is coincided with the axis of the restraining shell; the restraining shell and the liners are made of metal materials or plastic materials; and the explosives are common industrial explosives. The annular linear energy-accumulation cutter reasonably utilizes the energy of the explosives and can be used in excavating operation in coals or rocks and generate a plurality of cracks in the coals or the rocks; and the annular linear energy-accumulation cutter is particularly applicable to middle and deep hole pre-cracking blasting of coal seams and can effectively reduce or eliminate the danger of gas burst in the coal seams and prevent or reduce severe mining safety accidents such as gas burst or fire hazard.