Liquid sucking apparatus attached with agricultural motor tricycle

The utility model relates to a liquid suction device for agricultural tricycles, which is composed of a liquid holding tank body and a liquid discharging valve which is arranged at the lower part of the liquid holding tank body. The utility model is characterized in that the liquid holding tank body is provided with a float switch which is connected with one valve port of a three-way valve through a flexible tube; the other valve port of the three-way valve is connected with a packed bed filter on an engine; a main tube of the three-way valve is connected with an air intake valve of a cylinder end of the engine; a liquid suction tube is arranged at the upper right of the liquid holding tank body. The utility model is suitable for the agricultural tricycles to transport liquid, such as water, or excrement, or urine, etc., in countryside. The utility model improves work efficiency, and has the advantages of sanitation and convenience.