Method for changing raw material structure and fully exerting effect of device in global process

The invention discloses a method for changing a raw material structure and fully exerting the effect of a device in a global process, which comprises the following steps of: filtering raw material oil by a filter, heating the raw material oil by a raw material oil buffer tank and a heating furnace for reaction feeding, feeding the raw material oil into a hydrogenation reactor for reaction, and feeding the raw material oil into a high-pressure separation tank after passing through a heat exchanger; liquid separated from the high-pressure separation tank enters a low-pressure separation tank after pressure reduction, an oil phase of the low-pressure separation tank is heated by a heat exchanger and then enters a fractionation process, the oil phase from the reaction process enters a hydrogen sulfide removal stripping tower, medium-pressure steam is introduced into the bottom of the hydrogen sulfide removal stripping tower, and the medium-pressure steam is cooled by the heat exchanger and then enters a second re