The invention discloses a durable lubricating oil with a long service life. The lubricating oil is prepared from the following components: lubricating oil base oil, soybean oil, turpentine, triethanolamine, sorbitol, nano bentonite, lignin sodium sulfate, polyvinyl alcohol, nano alumina, dibutyl oleate, triisopropyl borate, and auxiliary additive. The provided lubricating oil has the advantages of good cooling performance and excellent lubricating effect, and can be used in most occasions. The anti-rust performance and lubricating effect of the lubricating oil are both enhanced. The stability is strong. The lubricating oil can precisely fill the lubricating surface and realizes continuous lubricating. Moreover, during the lubricating process, the functions of gravity and centripetal force are counteracted, the lubricating oil will not be leaked, and the pollution is prevented. The lubricating oil can be widely used to lubricate machinery, the machinery can be well protected, the energy is saved, the loss is reduced, and thus the lubricating oil has a wide application prospect.