As one of the research hot spots at home and abroad in the laser field nowadays, the applications of pulsed fiber lasers are becoming more and more extensive. Two typical configurations by which can obtain laser with nanosecond regime pulse duration are introduced and the key technologies of them are analyzed respectively based on the corresponding principles. Research progress at home and abroad in the field is summarized, then some problems to be resolved are put forward. At last the applications and develop prospect of pulsed fiber lasers are also presented.