The invention relates to a portable high-frequency X-ray inspection machine suitable for all operation occasions in the field of nondestructive testing. The portable high-frequency X-ray inspection machine comprises a controller and an X-ray generator connected by using a low-voltage cable, a bridge inversion driving circuit is adopted in the controller and used as a final output end to respectively transmit 40kHz main circuit power and 20kHz tube current control power into a pulse high-voltage transformer and an annular pulse filament transformer, a PWM (Pulse-Width Modulation) technology isutilized to set up a 40kHz power supply with controllable pulse width to drive the pulse high-voltage transformer, high voltage output by the pulse high-voltage transformer is multiplied by 10 times,rectified and filtered so as to ensure that an X light tube can obtain smoother direct current high tube voltage and a continuous and efficient X ray with stable energy can be obtained. Images formedby the invention is clear and has high resolution, and the invention can be used as a ray source for real-time imaging to replace a large power frequency mobile X-ray inspection machine, therefore, the design difficulty and cost on real-time imaging equipment can be greatly reduced, and the prospect of the invention is wide.