In this paper , we consider the correlated risk processes with negative risk sums . we define the correlation between the two classes of insurance business as the thinning dependence structure . we mainly study how the dependence between the two classes impacts on the ruin probability 本文引入了一類相關(guān)負(fù)風(fēng)險和風(fēng)險過程,負(fù)風(fēng)險和類之間的相關(guān)性由稀疏相關(guān)結(jié)構(gòu)定義,主要研究類之間的相關(guān)性對破產(chǎn)概率的影響。