[Objective] The research aimed to record new species of Alexandrium tamarense.[Method] Samples were examined by microscope in the lab.[Result] Two new recorded species: Karenia mikimotoi G.Hansen & Moestru and Protoperidinium leonis(Pavillard) Balech,were found.All specimens were deposited in the Seawater Harmful Algae Specimens Room of Ocean College of Hebei Agricultural University.[Conclusion] The red tide of Karenia mikimotoi G.Hansen & Moestru should be noted.