The invention discloses anti-ultraviolet anti-discoloration ultra-clean hydraulic oil which is prepared from the following components in parts by weight: base oil, methyl silicone oil, benzotriazole, sodium tripolyphosphate, a demulsifying agent, nano silicon dioxide, a UV-531 ultraviolet light absorber, an antioxidant, an anti-wear agent, a dispersing agent, a viscosity modifier, a defoaming agent, a lubricating agent and a cosolvent. According to the anti-ultraviolet anti-discoloration ultra-clean hydraulic oil, the problems that hydraulic oil in the existing market cannot resist ultraviolet and discoloration and is high in turbidity are solved, the protection effect on equipment after the product is used is improved, the anti-ultraviolet and anti-discoloration capacity is improved, meanwhile, a lubricating medium is used for slowing down abrasion of the product, the hydraulic oil has the functions of cleaning, preventing pollution and the like, prevents sedimentation and agglomeration of particles, improves the use effect of a product, delays yellowing, blocks physical property loss, better meets the use requirements, helps to improve the working speed and can facilitate work of workers.