The invention relates to a treatment method of hot-rolled steel plates, in particular a method for preventing an internal oxidation layer from generating in the non-oriented normalization treatment of electrical hot-rolled strip steel. The normalization treatment comprises a preheating section, a non-oxidation heating section, an even heating section and a cooling section, wherein the non-oxidation heating section adopts direct fire heating and has an air-fuel ratio coefficient of 0.85-0.95. An even heating furnace adopts electric heating or radiation tub heating in the atmosphere of N2 under the condition that in-furnace dew point is 65-10 DEG C below zero and oxygen content is not more than 0.1 percent. The invention reduces and eliminates the internal oxidation layer generated during the normalization of a hot-rolled strip steel during controlling the normalization process, radically eliminates furnace roller nodulation generated in final anneal, avoids subsequent furnace roller nodulation cleaning work, improves the efficiency and decreases the cost.