A controllable splitting method for a high current pulse, characterized in that the method comprises steps of: electrically connecting one silicon carbide photoconductive switch between an input end and an output end of a current pulse circuit for the current pulse; a pulse high-voltage source is used as an input of the current pulse, a time-domain signal of the pulse high-voltage source is electrically connected to an external triggering port of a pulse laser to serve as an external trigger signal; irradiating a laser pulse emitted by the pulse laser to the silicon carbide photoconductive switch; when no current pulse is input at the input end, the pulse laser failing to receive the external trigger signal, and to output the laser pulse, the silicon carbide photoconductive switch being in an off state without the irradiation of the laser pulse, and no current being output from the output end; when the current pulse is input at the input end, the time-domain signal triggering the pulse laser so that the pulse laser synchronously outputs a laser pulse on a time domain, the laser pulse irradiating the silicon carbide photoconductive switch so that the silicon carbide photoconductive switch is in an on state and an output current pulse with an output current pulse signal is output from the output end; controlling the waveform of the output current pulse by parameters including the excitation light intensity and the silicon carbide electrode spacing of the silicon carbide photoconductive switch, the output current pulse signal varies according to the parameters, so that a current pulse signal having a split waveform is formed at the output end in synchronization with the time domain of the input end, wherein the number of split peaks in the output current pulse signal having a split waveform is from 2 to 10. electrically connecting one silicon carbide photoconductive switch between an input end and an output end of a current pulse circuit for the current pulse; a pulse high-voltage source is used as an input of the current pulse, a time-domain signal of the pulse high-voltage source is electrically connected to an external triggering port of a pulse laser to serve as an external trigger signal; irradiating a laser pulse emitted by the pulse laser to the silicon carbide photoconductive switch; when no current pulse is input at the input end, the pulse laser failing to receive the external trigger signal, and to output the laser pulse, the silicon carbide photoconductive switch being in an off state without the irradiation of the laser pulse, and no current being output from the output end; when the current pulse is input at the input end, the time-domain signal triggering the pulse laser so that the pulse laser synchronously outputs a laser pulse on a time domain, the laser pulse irradiating the silicon carbide photoconductive switch so that the silicon carbide photoconductive switch is in an on state and an output current pulse with an output current pulse signal is output from the output end; controlling the waveform of the output current pulse by parameters including the excitation light intensity and the silicon carbide electrode spacing of the silicon carbide photoconductive switch, the output current pulse signal varies according to the parameters, so that a current pulse signal having a split waveform is formed at the output end in synchronization with the time domain of the input end, wherein the number of split peaks in the output current pulse signal having a split waveform is from 2 to 10.