Shale oil hydrotreating method and shale oil hydrotreating system

The invention relates to a shale oil hydrotreating method and a shale oil hydrotreating system. The method comprises the following steps: S1, enabling shale oil and hydrogen to enter a first reactor to be in contact with a hydrogenation protective agent and a first hydrofining agent, and carrying out hydrofining reaction to obtain a first reaction product; s2, heating the first reaction product through an external heating device, feeding the heated first reaction product into a second reactor, and sequentially contacting the heated first reaction product with a second hydrorefining agent, a hydrocracking agent and a hydrogenation deep refining agent for reaction to obtain a second reaction product; s3, the second reaction product enters a gas-liquid separator for gas-liquid separation, and the low-nitrogen hydrogenated shale oil is obtained. The problem of condensation coking of olefin and diene can be effectively avoided, and deep denitrification and desulfurization of shale oil can be realized at high tempe