Using artificial climate incubator indoor culture method,with "SA1" peanut varieties for experimental material,using pot way,according to the different intensity,respectively from the next PeiZhou elongation length,fresh weight,dry weight,PeiZhou under diameter,IAA concentration,GA concentration and ABA concentration seven aspects to analyze light intensity to peanut seedling stage growth under the influence of the PeiZhou.The results found that:light significantly inhibited peanut seedling under PeiZhou elongation,promote the PeiZhou diameter increase,reduce the IAA concentration,improve GA concentration,improve the ABA concentration.3500 lux is under the growth of peanut PeiZhou critical light intensity,light through the regulation under the peanut PeiZhou endogenous hormones influence its agronomic characters.