Following a previous paper in which a successful synthesis of polyphenyl-as-tria-zine from 1，4-dicyanobenzene was reported，we have prepared five new polyphenyl-as-triazines from terephthalamidrazone and different aromatic tetraketones．These poly-mers were characterized by TGA，DTA，elemental analysis and 1R spectroscopy．nlnh were between 1.39—2.16dl／g(0.5％ cresol，at 25℃)．All properties were determined by using specimens in the fotin of films and wire coatings． Experimental results show-ed that these polymers exhibited good thermal-oxidative stability．hydrolytic stability and tensile strength at room temperature with the exception of polymer VI．The films of polymers (I)一(V) suffered 4.30一5.31％ weight loss after isothermal aging in air at 300℃ for 200 hours．There were no change in weight when these films were treated in water at 200℃ for 30 hours．Wire coated with polymer (I) at room temperature in water has a resistance of 1011---1012Ω．Wten it was boiled in 40％ NaOH solution as long as 24 hours or submerged in water at 200℃ for 100 hours，no change in insula-tion was deteeted．