Jiayin area of Heilongjiang Province is the site， where the first dinosaur was discovered, and it plays a key role in the research history of Late Cretaceous dinosaurs in China. Lots of hadrosaurs had been found from this area, thus, it is the ideal place for the study of large sized ornithopod dinosaurs especially the systematic classification and evolution of hadrosaurs. However, compared with hadrosaur skeletons, theropod dinosaurs are very rare, they are mainly represented by teeth. Through detailed descriptions and comparisons of these recently discovered theropod teeth from Jiayin, the preliminary study indicates that these belong tyrannosaurids, dromaeosaurids, carcharodontosaurid, Fukuiraptor respectively and a possible new theropod.