This paper presents experimental studies in which the drying corn seeds are irradiatedby He-Ne laser at power densities of 2.8 mW/mm2,3.8 mW/mm2 and 5.4 mW/mm2, respectively, and the corresponding irradiating times last 5 s, 50 s and 500 s. As a result, the POD and CAT activities of corn seedling are enhenced while their AsAPOD activity is reduced and their GSH contents are increased. Consequently, the improvement of the active oxygen metabolism for plants the seeds of which have been irradiated can be expected.