The phosphors in the system Ca1-x (PO3)2: xEu3+ was synthesized by solid-state reactions and their photoluminescence properties were investigated. The synthesized host powder of Ca (PO3)2 was confirmed on Rigaku miniflex X-ray diffractometer (XRD) with scan speed of 2 deg/min with Cu Kα radiation. The photoluminescence spectra were recorded with the help of Hitachi FL-7000 photo spectrometer. The morphology of this phosphor was checked in the form of Scanning Electron Microscope (SEM) characteristics were carried out for this prepared phosphor. These phosphors have well absorption in the near UV region at 395 nm due to 7F0-­­-5L6 transition of Eu3+, which is suitable for excitation of ultraviolet light emitting diodes (UV-LEDs). The orange-reddish emission of Eu3+ at 614 nm due to 5D0—7F2 transition of Eu3+, in these phosphors can be used as a red component in the tri-color system. The emission spectra exhibit orange-reddish performance (CIE chromaticity coordinates: X = 0.6775, Y = 0.3223), which is due to the 5D0à7F2transitions of Eu3+ ions.The results interpretation clears that Ca (PO3)2: Eu3+ phosphors could be used in white light UV-LEDs.