The invention provides a reconfigurable composite waveform generation circuit. The reconfigurable composite waveform generation circuit comprises a constant-current charging module, a threshold setting module and a logic judgment module, in two branches of the constant-current charging module, one branch generates an output waveform signal, and the other branch controls the duration of a direct-current level; the threshold value setting module compares the input waveform signal voltage value, the direct current level and the preset threshold value of each key node, and outputs a mark signal to the input end of the logic judgment module; and the logic judgment module performs logic judgment according to a mark signal input by the threshold setting module, and outputs a switch control signal to be fed back to the two charging branches in the constant-current charging module. The analog circuit, the threshold setting module and the simple logic control unit are combined, output of direct-current level, sawtooth wave and direct-current and sawtooth wave time division multiplexing waveforms is achieved, hardware cost is low, software configuration is not needed, simple and continuous adjustment can be achieved, and flexibility is high.