Measuring far-field laser beam profile is an effective way to study the atmospheric transmission effects of high power laser and evaluate the pointing capability of high power laser system in a long distance. A laser beam profiler based on detector array is developed to measure the far-field beam intensity and temporal-spatial distribution of the high-repetition-rate pulsed laser beam, and the image of the far-field beam profile is reconstructed with the bilinear interpolation method. The detector array is composed of 297 Si-PIN photodiode detectors, with the spatial resolution of 1 cm in the central region, an effective sensitive area of 32 cm, and response wavelength between 300 nm and 1100 nm. The beam profiler is capable of measuring far-field beam profile of 1～20 kHz repetition rate pulsed laser, with minimal detectable pulse width of 10 ns, and dynamic range of energy density of 0.02～100 μJ/cm2.