A method and apparatus for forming a phosphor layer of a projection CCRT utilizes a sedimentation, in which phosphor particles forming a suspension are consistently precipitated and dried over the inner surface of a panel regardless of the particle sizes resulting in decreased porosity of the phosphor layer to improve brightness and resolution while reducing a working manufacturing time. The apparatus includes a supporter, a heating plate installed on the supporter for supporting and heating the integrally formed panel and funnel, a closing cap fitted into the end of a neck of the funnel for hermetically closing the inside of the panel and funnel from the outside, an air generator installed on the supporter for generating an air of high temperature, and an air guidance hose having an end inserted into the neck via the center of the closing cap for leading the air generated from the air generator into the inside of the panel and funnel, thereby precipitating the phosphor particles of the suspension injected into the inside of the panel and funnel by means of the air of high temperature under a predetermined pressure.