New aromatic polyamides having silicon and oxyethylene units in the main chain were synthesized by the low-temperature interfacial polycondensation of various aromatic diamines with bis(4-chlorocarboxyphenyl)dimethylsilane (DCMS). All the polymers were amorphous, and most of them were soluble in a variety of organic solvents such as NMP, DMF DMAc, DMSO, and m-cresol. Inherent viscosities were ranged from 0.43 to 1.08 dL/g. They could be cast from the NMP solution into transparent and flexible films having good tensile properties (41.4∼ 59.7 MPa). The glass transition temperatures of polyamides obtained from the oxyethylene-containing diamines were 115∼287℃. The temperatures of 10% weight loss under nitrogen of the polymers were in the range of 434 and 477℃. Number-average molecular weights (M_n) and weight-average molecular weights (M_W)of the polyamides determined by GPC using polystyrene standards were from 114000 to 385000 and from 184000 to 628000, respectively.