The invention relates to a multi-function low-power-consumption agricultural tractor, which comprises an engine, a transmission case, a cab assembly, a cargo tank assembly, a rear axle assembly, a suspension assembly, double top hydraulic cylinders, a side beam type/stamped and riveted structure large beam assembly, a fuel tank, a battery, and a front axle assembly. The invention has the beneficial effects that the QC2110 engine is adopted, the power demand can be satisfied, and the power can be saved to the largest extent; the 130 transmission case and the 130 enhanced rear axle are adopted, the fuel consumption can be reduced, the bearing capacity is higher and can be matched with the power of the engine; the two top hydraulic devices are arranged on a chassis, a rotary cultivator can be installed on the chassis for agricultural farming operations in agricultural peak seasons, the cargo tank can be installed on the chassis for transportation in slack seasons, and multiple functional needs can be met; the side plates and the rear plate of the cargo tank are hinged instead of welding, the dead paint angles of the welded carriage can be eliminated, the flow of liquid rust can be avoided, and the loading, unloading and transportation of goods can be facilitated.