Biocompatible particles, according to the present invention, have encapsulated nanoparticles comprising a liposome including a drug therein, and comprise a PEO-PPO-PEO copolymer which is associated on a surface of the liposome. The biocompatible particles, according to the present invention, can flexibly control a drug release rate regardless of the solubility unique to the drug due to increased stability in an aqueous solution, thereby exhibiting continuous drug release. Also, the present invention exists stably in a powder form, thereby providing convenience for storage and administration. Therefore, the biocompatible particles according to the present invention can be useful as a drug delivery carrier.