Multifunctional agricultural equipment with functions of irrigation, fertilization and pesticide application

The invention discloses multifunctional agricultural equipment with functions of irrigation, fertilization and pesticide application, and relates to the technical field of agricultural equipment. Theequipment comprises a four-wheel intelligent mobile platform and a controller, a water tank and a mechanical arm assembly are arranged on the four-wheel intelligent mobile platform, and a liquid quantitative release device is fixed to the end of the mechanical arm assembly; a water pump is arranged in the water tank and is communicated with the liquid quantitative release device through a hose; the liquid quantitative release device comprises a closed shell, an open hole is formed at the bottom of the shell, a liquid quantitative measuring mechanism is arranged at the position, located at theperipheral side of the open hole, of the side face of the outer bottom of the shell, the bottom end of the liquid quantitative measuring mechanism is connected with a drainage pipe, and a first electromagnetic valve is arrange