The utility model relates to an online split instrument for 35kV fusion tube compares with prior art and to have solved fusible core and change the defect that must take off the fusion tube from the circuit. The utility model discloses a layering and upper pressing bar are the arc down, down both ends and the upper pressing bar's of layering both ends are divided equally and are do not installed on left -hand thread pole and right -hand thread pole, down the layering lie in the upper pressing bar below and down the layering put together with upper pressing bar and form the ellipse, lower layering and the diameter that oval -shaped minor axis length is lighter than the tube cap that upper pressing bar forms, it installs left nut to lie in the upper pressing bar top on the left -hand thread pole, it installs right nut to lie in the upper pressing bar top on the right -hand thread pole, left side staple bolt and the below of right staple bolt clamp the porcelain crowd, layering and upper pressing bar are spacing on the tube cap through left nut and right nut down. The utility model discloses need not to follow the circuit with the fusion tube and take off the dismouting that to accomplish the fusion tube, simplified the dismouting degree of difficulty of fusion tube, can accomplish the dismouting of whole fusion tube through the one man operation.