A crystallizer for continuous casting, comprising: a graphite sleeve provided with a plurality of drawing holes , and a cooling jacket provided inside with a coolant cavity; wherein the graphite sleeve is of a plate shape and has two plate faces; the drawing holes penetrate through the two plate faces along a length direction or a width direction of the graphite sleeve ; and the cooling jacket is of a plate shape and provided at least in two, the two plate faces being both attached to the cooling jacket so as to cool the graphite sleeve , wherein the cooling jacket comprises a first cooling jacket, the first cooling jacket including a cover plate and a base ; the base comprises a base plate , a first side plate parallel to a length direction of the drawing holes and a second side plate vertical to the length direction of the drawing holes ; the cover plate , the base plate , the first side plate , and the second side plate enclose to form the coolant cavity; the cover plate is provided thereon with a first liquid inlet hole ; and the first side plate is provided thereon with a first liquid outlet hole , characterized in that the graphite sleeve is provided with a plurality of drawing holes , and wherein the cooling jacket comprises a second cooling jacket ; the crystallizer for continuous casting comprises a graphite sleeve , a first cooling plate, and a second cooling jacket , wherein two or more graphite sleeves are provided; the second cooling jacket is attached between two neighboring graphite sleeves ; two first cooling jackets are provided, the graphite sleeves and the second cooling jacket being provided between the two first cooling jackets. a graphite sleeve provided with a plurality of drawing holes , and a cooling jacket provided inside with a coolant cavity; wherein the graphite sleeve is of a plate shape and has two plate faces; the drawing holes penetrate through the two plate faces along a length direction or a width direction of the graphite sleeve ; and the cooling jacket is of a plate shape and provided at least in two, the two plate faces being both attached to the cooling jacket so as to cool the graphite sleeve , wherein the cooling jacket comprises a first cooling jacket, the first cooling jacket including a cover plate and a base ; the base comprises a base plate , a first side plate parallel to a length direction of the drawing holes and a second side plate vertical to the length direction of the drawing holes ; the cover plate , the base plate , the first side plate , and the second side plate enclose to form the coolant cavity; the cover plate is provided thereon with a first liquid inlet hole ; and the first side plate is provided thereon with a first liquid outlet hole , characterized in that the graphite sleeve is provided with a plurality of drawing holes , and wherein the cooling jacket comprises a second cooling jacket ; the crystallizer for continuous casting comprises a graphite sleeve , a first cooling plate, and a second cooling jacket , wherein two or more graphite sleeves are provided; the second cooling jacket is attached between two neighboring graphite sleeves ; two first cooling jackets are provided, the graphite sleeves and the second cooling jacket being provided between the two first cooling jackets. <EOS>