The invention discloses a broadband energy collection apparatus by combining a piezoelectric support beam and a suspension type electromagnetic resonant unit; the apparatus can be fixed on a bridge road surface for collecting road surface vibration energy or mounted on an overhead bride steel frame for collecting overhead air flow energy, wherein the suspension type electromagnetic resonant unit can be used as tail end load quality of the piezoelectric support beam and is used for collecting road surface vibration energy of low frequency band mainly based on an electromagnetic induction principle, wherein the piezoelectric support beam, used as a thin beam structural body, can perform fluid-solid coupling with external air flow to generate fluid-caused vibration; in addition, the resonantcharacteristic of the piezoelectric support beam can be adjusted by a quality sliding block on the piezoelectric support beam; and fluid-caused vibration energy of medium and high frequency bands canbe collected mainly based on a positive piezoelectric effect.