Provided are a structural body health detection apparatus based on radar pulses and a method thereof. The invention relates to the technical field of structural body health monitoring, and solves problems that power supply schemes in the prior art are low in feasibility; communication structures are weak in anti-interference capability; and the cost is high. The structural body health detection apparatus mainly comprises a perceiving module and a communication module. The perceiving module for radar measurement is composed of a radar pulse generator, a pulse storage capacitor, a switching circuit, a passive sensor group and a timing module. The structural body health detection apparatus of the invention is applied to monitoring health of structural bodies such as bridges and buildings.