Device for counting algae in water sample

The utility model provides a device for counting algae in a water sample, which comprises a counting plate, the surface of the counting plate is provided with an accommodating pool for accommodating samples, the surface of the counting plate is also provided with capillary grooves surrounding the peripheral side of the accommodating pool, and the capillary grooves are used for filling sealing oil; and the cover glass is arranged on the top surface of the counting plate and covers the accommodating pool, and at least one part of the capillary groove is covered by the edge of the cover glass. According to the device for counting the algae in the water sample, disclosed by the utility model, the sealing oil is poured into the capillary groove, and the sealing oil can form an oil film at the contact part of the cover glass and the counting plate to seal the contact gap, so that moisture in the accommodating tank is prevented from being volatilized, the position of the algae in the water sample is fixed, and the c