High-sensitivity and visible-blind ultraviolet (UV) photoconductive detectors based on $\mathrm{Sr}\mathrm{Ti}{\mathrm{O}}_3$ single crystal with interdigitated electrodes are reported. The responsivities of photovoltage and photocurrent can reach $2.13\times {10}^5\mathrm{V}∕\mathrm{W}$ and $213\mathrm{mA}∕\mathrm{W}$ , respectively, at $330\mathrm{nm}$ at ambient temperature, and the corresponding quantum efficiency η reaches 80.2%. The dark current is lower than $50\mathrm{pA}$ at $10\mathrm{V}$ bias, and the UV/visible contrast ratio is about four orders of magnitude with a sharp cutoff at $390\mathrm{nm}$ . The experimental results demonstrate that $\mathrm{Sr}\mathrm{Ti}{\mathrm{O}}_3$ single crystal has potentially wide applications in UV detection.