In the experiment, the authors used N2 laser and He-Ne laser to radiate four varieties of dry wheat seeds such as "Mianyang 21", etc. A random plotting was used with three duplications. A method of biological statistics and quantity inherit was used to study the genetic variation of 11 stalk traits of plant height and length of stalk of L_1 and L_2 generations. The results indicate that different radiation material has different influence on the next generation; different kinds of laser has litde influence on the next generation; higher plants and longer stalks have a stronger heritage, earlier generation single plant has a better effect