Base liquid of synthetic base drilling fluid

The invention discloses base liquid of synthetic base drilling fluid, which comprises the following raw materials, such as limonene, bipentene, butylcellosolve, alkyl polyglucoside, alcohol ether carboxylate, white oil and dimethyl silicon oil. The base liquid combines the advantages of an ether group and alpha-olefin base liquid, makes up the defects of a single component and has little influence of viscosity by the change of temperature and wide application range; the selected raw materials almost do not contain aromatic hydrocarbon and have lower cost; and the base liquid of the synthetic base drilling fluid not only has low production cost but also has good biodegradation performance and environmental friendliness, can adapt to the wide acid-base condition and has favorable surface activity, lubricating performance and chemical stability.