The invention discloses a remotely coated fluorescent powder plate and a preparation method thereof. The preparation method comprises the steps of 1, design and manufacturing of a mold: designing and manufacturing a glass mold provided with a groove and a positioning through hole and matched with a dispensing device; 2, deploying and dispensing of fluorescent colloid: mixing fluorescent powder with silica gel, then stirring uniformly, and defoaming to acquire the fluorescent colloid; uniformly spraying a releasing agent to the inner wall and the bottom of the groove of the glass mold, and then dispensing the colloid; 3, solidification: after colloid is dispensed, standing horizontally, and after the colloid flows flat, placing the glass mold into an oven for baking so as to solidify the fluorescent colloid in the groove; and 4, demolding: scraping the solidified fluorescent colloid away from the inner wall of the groove to acquire the remotely coated fluorescent powder plate. According to the preparation method provided by the invention, the silica gel with rigidity of Shore hardness D40 which is higher than the rigidity of common COB packaging silica gel, so that the prepared remotely coated fluorescent powder plate is prone to shape and demold, good in shape retentivity, and is applicable to integrated lamps, with good photoelectric index.