The invention discloses an energy-saving and environmentally friendly brush cutting device for park and garden construction. The energy-saving and environmentally friendly brush cutting device for park and garden construction comprises a driving shaft, a brush cutting rod, a motor, a carburetor, a protecting box, an environmentally friendly air suction device, a connecting tube terminal, a high-pressure sprayer, a transmission gear, a brush cutting blade, a handle, a starting and stopping switch, a controller, a protector and straps, wherein the top end of the driving shaft is connected with the transmission gear; the front end of the transmission gear is fixedly connected with the brush cutting blade; the lower end of the brush cutting blade is fixedly connected with the environmentally friendly air suction device through the brush cutting rod; the top end of the driving shaft is in driving connection with the brush cutting blade through the transmission gear; the lower part of the driving shaft is in driving connection with the motor; the driving shaft is arranged in the brush cutting rod; the left end of the motor is connected with the carburetor; and the outside of the motor isconnected with the protecting box. The optimal brush cutting effect is achieved, flower and grass residues are prevented from dropping messily, environmental friendliness is improved, the device is convenient to operate, flexible irrigation and water spraying can be implemented, functions are improved, and the working efficiency is improved.