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The objectives of this work were to clarify the spatial distribution pattern of the overwintering eggs of M. hieroglyphica ( Motschulsky) . An investigation with stratified random sampling was conducted on the egg number in corn field of Jinzhong, Shanxi province in October 2011. The spatial distribution pattern of the overwintering eggs of M. hieroglyphica in soil was studied by determination of frequency distribution, aggregated indices, the improved Iwao忆 s regression equation and Taylor忆s power law. The reasons for the aggregation of the overwintering eggs of M. hieroglyphica was analyzed according to estimation by aggregation mean ( 姿 ) . Results indicated that the overwintering eggs of M. hieroglyphica belong to negative binomial distribution and the aggregated indices of overwintering eggs met C>1, C A >0, I> 0, k>0, m * / m>1, so M. Hieroglyphica eggs in soil presented pattern of aggregation distribution in low population density, and its fundamental component was the individual that was mutually exclusive. The rate of relative aggregation change of fundamental component was 3. 52m -15. 61, which changed with the population density of overwintering egg of M. hieroglyphica. The greater the population density of overwintering eggs, the greater the change rate of relative aggregation degree. The degree of aggregation increased with the population density of overwintering eggs. Aggregation mean 姿 value

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