A sub-picosecond ultraviolet calibration facility is established based on the uniform profile of a gas dye laser, and this is specially designed for the inertial confinement fusion diagnosis system calibration. The laser beam operates at 248.5 nm with a pulse width of about 0.5 ps and a total energy of about 100 mJ, and generates a uniform spot that is about 35 mm×25 mm. Some preliminary calibration results of a high temporal resolution diagnosis system are obtained on the facility, which proves that the parameters of picosecond systems can be calibrated on the facility. Since the energy output is stable, it is possible to develop a quantitative time-resolving calibration technique.