Hot loading method for medium-thick slabs

The invention relates to a hot loading method for medium-thick slabs. The method includes: cutting the medium-thick slabs into specific lengths, conveying for rolling, using a traveling vehicle to hang high-temperature slabs to a slow cooling stacking position, placing normal-temperature medium-thick slabs on the high-temperature slabs, stacking in a way that a normal-temperature medium-thick slab is placed between two high-temperature slabs and the topmost piece of each stack is a high-temperature slab for 10-14 hours until each high-temperature slab is cooled to the required uppermost limit of hot loading and each normal-temperature medium-thick slab is preheated to the required lowermost limit of hot loading, and loading the slabs into a heating furnace. Normal-temperature medium-thick slabs are preheated by heat released by high-temperature slabs during slow cooling to reach a surface temperature of more than 400-550 DEG C so as to achieve hot loading. Waste heat of the high-temperature slabs are utilized to the maximum limit and fine energy conservation effect is achieved. A novel method for preheating normal-temperature slabs outside the furnace is created, and fracture of the slabs due to normal-temperature slabs are heated in the heating furnace can be avoided.