The invention discloses a heat-conduction oil heating device for a heat-conduction oil furnace. The heat-conduction oil heating device comprises the heat-conduction oil furnace, a first interface is formed in the lower side of the heat-conduction oil furnace, a second interface is formed in the upper side of the heat-conduction oil furnace, a first heat-conduction oil
pipe is arranged at the end,away from the heat-conduction oil furnace, of the first interface, the bottom end of the first heat-conduction oil
pipe is fixedly connected with a second heat-conduction oil
pipe, and a stop valve isarranged between the first heat-conduction oil pipe and the second heat-conduction oil pipe. A first oil injection hole is formed in the left side of the second heat-conduction oil pipe, an
oil filter is arranged in the middle of the second heat-conduction oil pipe, and a
graphite heat exchanger is arranged on the right side of the
oil filter. By means of the heat-conduction oil heating device,
hydrochloric acid is prevented from being plunged into the heat-conduction oil furnace after sealing of the
graphite heat exchanger is damaged, it is convenient for a worker to monitor by arranging a
PH meter, and the heat-conduction oil furnace is better protected. If an acid-connecting accident happens, only the heat-conduction oil in the second heat-conduction oil pipe is contaminated, the probability that the heat-conduction oil in the heat-conduction oil furnace is contaminated is reduced, and the cost loss is reduced.