A method for preparing a polyetherimide precursor is provided to improve work stability by using a common solvent having no toxicity and to inhibit phase separation by increasing the compatibility with an epoxy resin. A method for preparing a polyetherimide precursor comprises the steps of adding a first monomer containing an aniline group to a solvent represented by RO-(CH2)n-OH to prepare a mixture solution; and adding a second monomer containing an anhydrous group to the obtained mixture solution to react them, wherein R is a substituted or unsubstituted C1-C3 alkyl group; and n is an integer of 2-10. Preferably the solvent is at least one selected from 2-methoxyethanol, 2-methoxypropanol, 2-ethoxyethanol, and 2-ethoxypropanol.
