NOVELTY - Preparing picloram-choline aqueous alkaline solution by reacting picloram raw material and aqueous choline with water as medium, stirring reaction mixture, adding surfactant to obtained solution and stirring the solution to obtain the picloram-choline aqueous alkaline solution, where molar ratio of choline and picloram in the alkaline solution is 1:0.8-1.1, 2-8 %mass surfactant is added to the solution, and amount of water used is based on determined/required water content in the alkaline solution.    USE - The method (M1) is useful for preparing picloram-choline aqueous alkaline solution. The method (M2) is useful for preparing picloram-choline raw material (all claimed), which is used for preparing picloram-choline aqueous alkaline solution used as herbicide.    ADVANTAGE - The method does not allow easy crystallization of picloram amine salt and picloram potassium salt even at higher concentration. The prepared picloram-choline aqueous alkaline solution is convenient to use, and cost of packaging, storage and transportation is also low. The prepared picloram-choline raw material has high purity, stability and solubility and does not contain any dust particles, hence the raw material is suitable for preparing different concentrations of picloram-choline aqueous alkaline solution. The method is simple and does not discharges effluents or wastewater, hence environmentally-friendly. The distillate and mother solution can be further recycled for preparation of the aqueous alkaline solution.    DETAILED DESCRIPTION - Method (M1) for preparing picloram-choline aqueous alkaline solution involves (a) reacting picloram raw material and aqueous choline with suitable amount of water as medium at 30-75 degrees C and pH 7-12 for 30-60 minutes and stirring reaction mixture, and (b) adding surfactant to obtained solution, and stirring the solution to obtain the picloram-choline aqueous alkaline solution, where molar ratio of the choline and picloram in the alkaline solution is 1:0.8-1.1, 2-8 %mass surfactant is added to the solution, and amount of water used is based on determined/required water content in the alkaline solution. An INDEPENDENT CLAIM is included for method (M2) for preparing picloram-choline raw material, which involves performing the above-mentioned step (a), concentrating obtained picloram-choline aqueous alkaline solution under reduced pressure to obtain wet picloram-choline and drying the wet picloram-choline to obtain the picloram-choline raw material.