Using fine inbred lines of popcorn as a material,which grain quality and genetic background are very different,correlation of their yield,popcorn inflation multiple and the with main quantity characteristics were path analyzed in the paper.The results showed that the correlation coefficient between the yield of popcorn and the main quantity characteristics were in following sequence: number of seeds per row＞ear length＞ear thickness＞hundred grains weight＞plant height＞stem thickness＞seed rate＞number of lines per ear＞ear height in plant＞bare point length＞starch content;the correlation coefficient between the inflation multiple and main quantity characteristics were in following sequence: expansion volume＞ popcorn rate＞starch content＞number of seeds per row＞ear height in plant＞ear length＞stem thickness＞yield of a plot＞plant height＞number of lines per ear＞seed rate＞bare point length＞hundred grains weight＞ear thickness.