A novel double-pulse supply is proposed to address the issues of complex circuit structures, expensive components, and limited flexibility in traditional double-pulse power supplies consisting of energy storage capacitors, high voltage capacitor, inductors, and triggered gas switches. This double-pulse power supply can generate two positive or negative high voltage pulses with an adjustable pulse interval time. The minimum pulse interval time (1 μs) of this supply is much shorter than traditional systems (200~300 μs). Due to the high transformation ratio (>120) of the Tesla transformer, it allows for implementing low-cost and highly reliable solid-state switches instead of triggered high-voltage gas switches. An output pulse voltage up to 100 kV is achieved while charging only about 1200 V on the primary capacitor. The rising edge of the output pulse can be compressed from several microseconds to nanoseconds range by adjusting parameters in the magnetic compression network. This generator possesses properties such as small size, low price, high efficiency, and flexible parameters compared with other double-pulse devices.