The invention relates to the field of microalgae, in particular to a microalgae collecting method and a microalgae. The microalgae collecting method comprises the following steps of energizing microalgae culture liquid by an inert electrode, electrically shocking microalgae cells, and adding an inorganic flocculant to flocculate. The microalgae collecting method has the advantages that the usage amount of the fluocculant is greatly reduced, the flocculating time is greatly shortened, the flocculating rate of the microalgae is high, and the effects of being more economical and efficient are realized; especially for the microalgae with higher activity capability, such as flagellated microalgae, the effect is more outstanding.