The all-inorganic CsCu2 I3 crystal was characterized by one-dimensional perovskite structure with orthorhombic crystal system and Cmcm space group, which was expected to be widely used in optoelectronic devices. In this paper, a transparent and high-quality CsCu2 I3 single crystal with diameter of 1 inch (1 inch = 2. 54 cm) was grown by vertical Bridgman method, employing recrystallized CuI as the raw material. The phase structure and stability of the crystal were investigated by means of X-ray powder diffraction and thermogravimetric analysis. The optical and luminescence performance of the crystal was studied by means of ultraviolet-visible transmission spectroscopy, photoluminescence spectroscopy, fluorescence lifetime and fluorescence quantum yield. In addition, the variable temperature fluorescence spectra were measured at 100 ~ 250 K. The photoluminescence intensity decreases with increasing temperature due to strong electro-phonon coupling. The exciton binding energy (Eb ) of the crystal is 98. 12 meV. The study shows that the CsCu2 I3 crystal exhibits good optical properties.