Abstract: The influencing factors in the course of synthesis of furan resin modified by urea-formaldehyde resin, such as reaction temperatures, molar ratio of formaldehyde and urea, pH values, charging ways and the addition of modifying agents, have been studied.Meanwhile, a more proper processing condition of synthesis of furan resin with high water content has been found.The furan resin product is a brown transparent liquid, which has the performance:tensile strength 2.28 MPa, mass fraction of water 18.9%, mass fraction of free formaldehyde 0.23%, viscosity(20℃) 31 mPa·s.