Microscopic examination method for phytoplankton algae

The invention relates to a microscopic examination method for phytoplankton algae. The invention solves the problem that the counting accuracy is reduced in a dry environment by using a visual field counting method. The method comprises the following steps of: 1, preparing a to-be-detected object into a glass slide, and carrying out qualitative identification on phytoplankton algae in a visual field; and 2, drying the glass slide, and after drying, carrying out the counting process of the phytoplankton algae and the whole-piece counting process of the rare algae under a glass slide microscope. When the humidity of a microscope room is only 20%, the method provided by the invention can be used for accurately counting samples, the counting accuracy is obviously improved compared with that of an existing visual field method, and the detection method provided by the invention solves the problem that visual field method counting cannot be accurately carried out due to dry environment humidity, and has a very good