It is shown in this paper that intermediate bodies synthetized by sol-gel technique can lower the melting points of melts. The authors synthetized 9 quenching silicate melts in SiO2Al2O3-Na2O(K2O) series at 1750~1850℃and 2.0~4.0GPa. The Laser Raman Microprobe (LRM) study of these quenching melts has obviously shown that within the high frequency region (900~1200cm-1), the higher the pressure, the smaller the frequency of T-Onb symmetry and antisymmetry stretching vibration. The silicate melts of Na(K)/Al<1 may have six-coordination aluminum, and the aluminum tends to transform its coordination number from four-coordination to six-coordination when the pressure of silicate melts become higher.