X-rays produced through picosecond petawatt lasers have high flux, short pulse duration, and tiny focal spot. High spatial and temporal resolution X-ray point-projection backlight radiography developed using such high flux X-rays is an important diagnostic technique for measuring the dynamic response of materials under intense laser load, the inertial confinement fusion, and other high energy density physics. Short pulse X-rays are generated through the picosecond petawatt laser beams on TITAN and OMEGA-EP systems, as well as the upgraded SHENGUANG-II facility and other large picosecond watt laser facilities. The spectrum, conversion efficiency, and resolution of the X-ray backlights produced using the interactions between the picosecond petawatt lasers and solid targets are characterized in the experiments conducted herein. Furthermore, the technology of point projection backlighting is developed, and the dynamic demonstration experiment is performed. Images of the compressed fuel of inertial confinement fusion targets and the ejecta of shock-loaded materials are successfully obtained using backlight radiography.