The invention discloses an operation control device for an electrolyte tank. A tank control machine (2) is provided with a communication interface (1) inside, an interface message processor (3) is connected with the communication interface (1), a CPU controller chip (7) is connected with the communication interface (1) through a buffer circuit (12), the CPU controller chip (7) is connected with apreheating indicator light (4), a broken indicator light (5), and a normal indicator light (6). In order to facilitate field observation, the invention adds an arrangement of a 'broken tank' state, and adds the indicator lights displaying 'preheating', 'broken' and 'normal', so that a field administrator can intuitively know the current working condition of the electrolyte tank, moving the anode is avoided in 'preheating' the tank, the operation security is ensured, and meanwhile the electrolyte tank displaying 'broken' is paid with more attention to reduce the possibility of the sink condition. The structure is simple, the operation is easy, and the cost is low.