Multifunctional agricultural miniature working machine

A multifunctional small-sized working machine for agricultural use is provided, which comprises a power mechanism, a variator assembly, a machine frame, a driver's seat, a steering mechanism, a lifting mechanism, and three travel wheels. The machine frame is a three-wheel frame with arched cross section and raised in the middle. The steering mechanism is positioned above the three-wheel frame. The variator assembly is a transmission gear box arranged with a car differential gear. A clutch wheel and three speed-variable gears are arranged on a main shaft. Four fixed gears are arranged on a shaft 2 near to the main shaft, wherein three fixed gears are respectively engaged with the three speed-variable gears on the main shaft. A fixed gear and a double link gear are arranged on a shaft 3, wherein the double link gear can be integrated with or separated from the fixed gears. The car differential gear is arranged on an upper-stage shaft 4 engaged with a driving wheel shaft 5. The machine frame is provided thereon