Standard oil for rubber oil resistance detection and preparation method of standard oil

The invention discloses standard oil for rubber oil resistance detection and a preparation method of the standard oil. The standard oil comprises the following components by weight percent: 0.1-1% of diisopropyl benzene, 1-5% of diisoamyl naphthalene, 10-30% of KN4010 naphthenic rubber oil, 20-50% of KN4006 naphthenic rubber oil, 10-20% of KG-12 rubber oil, 15-35% of KG-06 rubber oil and 0.1-0.5% of antioxidant T501. The standard oil has an independently developed formula, and can be used for replacing American imported IRM 901 standard oil. In addition, adopted raw materials can be domestically purchased, so that import is avoided and the cost is effectively lowered.