Online monitoring device of electric reactor

An online monitoring device of an electric reactor includes a data collecting module. The data collecting module is connected with a module converter. The module converter is connected with a data processing part. The data processing part is connected with a background monitoring device. The data processing part includes a first fixed frame, a first rubber block, a laptop computer, a support, a second rubber block, a screw rod, a second fixed frame, a screw hole, a butterfly handle, a fixed pipe and a screw rod. According to the invention, the first rubber block and the second rubber block can cooperate with each other so as to clamp the laptop computer. The laptop computer can be prevented from falling from the support effectively, so that computer use of an operator is facilitated. The screw rods can be rotated so as to drive the second rubber block to move, so that the first rubber block and the second rubber block can cooperate with each other for clamping the laptop computer. The first rubber block and t