It is rePOrted that with some new dye molecules added to PMMA by doping and copolymerizing Prepare to solid films are Prepared. With a corona-POling method, a land stable second-order nonlinear optical coeffiCient is obtained (d33=1.26×10 -7 esu).The influences of POling condition, molecular Structure and the different type films on the magnitude and stability of NLO properties are studied in detail.