The accommodation of liquid propellant in current-used weapons and equipment makes it important for expanding its application field in various existing weapon systems in the form of general solid propellant. In the current paper， a nitrocellulose-based energetic hollow spherical shell that can be used to encapsulate the liquid propellant is designed. The preparation method is based on the spherical propellant prepared by the internal solution method and on the principle of double emulsification， using W/O type Pickering emulsifier active calcium phosphate and O/W type emulsifier sodium carboxymethyl cellulose to make the emulsion containing nitrocellulose emulsify into a monodisperse W/O/W type emulsion， then evaporate the solvent to obtain the shell. The feasibility of activated calcium phosphate on the W/O type emulsifier has been examined through triple contact angle technique using a contact angle meter. Besides， the basic morphology and particle size， as well as packing density have been characterized using a ultra-depth-of-field electron microscopy system and mass-volume method， respectively. Results show that the three-phase contact angle of activated calcium phosphate is 121.80°. The shell has a large cavity structure with a particle size of 0.7-1.1 mm and a bulk density of 0.1-0.2 g·mL^-1. The microstructure demonstrated a majority of white fiber structure. In addition， embedded white particles in the fiber could also been observed. The optimized ratio of sodium carboxymethyl cellulose to active calcium phosphate， and active calcium phosphate to nitrocellulose should be 1∶1-1.25∶1 and 0.16∶1-0.24∶1， respectively.