The invention relates to a mixed organic solvent for preparing high-temperature sintered conductive paste, and belongs to the technical field of oily organic solvents. The mixed organic solvent comprises 10-60 wt% of fatty acid ester containing a phenyl ether structure, 10-60 wt% of butyl carbitol acetate, 0.1-10 wt% of at least one of 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate, 2,2,4-trimethyl-1,3-pentanediol diisobutyrate, 10-30 wt% of dimethyl adipate, 0.1-0.5 wt% of gamma-methacryloxypropyltrimethoxysilane and 0.5-1.5 wt% of silicone oil. The mixed organic solvent has the advantages that the solvent has the characteristics of good resin solubility, good wettability to metal particles, no volatilization at room temperature, stable volatilization at high temperature and the like, various types of resin commonly used by photovoltaic front silver paste can be well dissolved, and experiments prove that compared with a traditional single solvent system, the solvent is more suitablefor the requirements of silver paste printing and sintering; and the solvent is simple in reaction condition and high high product yield, and has favorable application prospects in the photovoltaic industry and electronic conductive paste related fields.