The invention relates to a sand protecting and dust removing device for a cooling tower, which comprises a spraying nozzle and a sand filtering pool, wherein the spraying nozzle is arranged at the upper side of the air inlet of the cooling tower, and the spraying direction of the spraying nozzle is interlaced with the air intake direction of the air inlet of the cooling tower; the sand filtering pool is arranged at the lower side of the cooling tower and corresponds to the position of the spraying nozzle; a water collecting pool is arranged at the inner side of the sand filtering pool, and a water discharging pool is arranged at the outer side of the sand filtering pool; and sand filtering screens are respectively arranged between the water collecting pool and the sand filtering pool and between the sand filtering pool and the water discharging pool. The sand protecting and dust removing device for the cooling tower, which is provided by the invention, has simple structure, can thoroughly protect sand and remove dust, can be used conveniently, and can not influence the load of a draught fan.