Detailed review on long-pulse TE CO_2 lasers based on Pulser/ Sustainer technology is given. Characteristics of PFN ( Pulse-forming Network) discharge are simulated by Pspice. A UV-preionized long-pulse TE CO_2 laser is built. 本文首先系统地总结了基于Pulser/Sustainer技术的长脉冲TECO2激光器的各种基本技术,并采用Pspice软件模拟了脉冲形成网络(PFN)在各种条件下的放电特点。