The invention relates to a low-load n-alkane solvent oil production process, belonging to the technical field of oils and chemicals, and aiming to provide an n-alkane solvent oil production process which has the advantages that a cooled and refined product of reaction can be recovered independently, and the residual heat of the product of reaction can be recovered, so that the load of original equipment can be reduced, and the energy consumption can be lowered. According to the technical scheme, the low-load n-alkane solvent oil production process mainly comprises the following steps: separating the cracking heat of a product of cracking reaction at a high pressure, separating cracked hot heavy oil at a low pressure, exchanging heat between cracked cold light oil and the refined product of reaction, mixing cracked hot light oil with the cracked cold light oil, cracking and distilling.