The invention discloses a phase modulation based communication detection integrated signal design method and device, and relates to communication detection. The Phase modulation based communication detection integrated signal design method comprises the steps of determining a time frequency function of a phase modulation waveform; determining a detected phase modulation rate and a function relationship based on the determined time frequency function; determining detection and communication signals which have an orthogonal relationship based on the determined function relationship; mixing and adding the detection signal with the communication signal to form detection-communication signal integrated signal design. The device comprises a first determination unit, a second determination unit,a third determination unit and a mixing unit. The phase modulation rate and the phase modulation distance of the detection signal and the communication signal are determined based on the system bandwidth determined by an application demand, and a waveform parameter is determined based on the application demand and the environment; the detection signal and the communication signal are mixed after detection and communication phase modulation signals are determined. The phase modulation based communication detection integrated signal design method can efficiently improve the existing frequency resource, can improve the spectrum utilization rate and can improve the system energy efficiency.