NOVELTY - Method for preparing plant nutrient solution from slurry separated during solidification of natural rubber latex, involves collecting slurry in circulation tank, aging, hydrolyzing and naturally fermenting the slurry to obtain aged hydrolyzate, filtering the slurry, concentrating and filtering the slurry, adding preservative to aged hydrolyzate or concentrated solution, stirring the mixture to obtain organic slurry, adding plant growth promoter to the slurry, and performing ultramicro-homogenization process to obtain first organic plant nutrient solution.    USE - The method is useful for preparing plant nutrient solution from natural rubber latex slurry.    ADVANTAGE - The method prevents environmental pollution as it recycles waste into useful product, and improves yield and quality of agricultural products.    DETAILED DESCRIPTION - Method for preparing plant nutrient solution from slurry separated during solidification of natural rubber latex, involves (a) squeezing and dewatering coagulated and solidified natural rubber latex, and collecting the squeezed slurry in circulation tank instead of discharging into sink, (b) aging, hydrolyzing and naturally fermenting the obtained slurry for 8-10 hours in circulation tank, naturally adjusting pH of the slurry to 4.5-6.5, and obtaining aged hydrolyzate, (c) naturally settling the aged hydrolyzate, filtering the slurry using fine plain cloth, concentrating and filtering the slurry using reverse osmosis (RO) membrane to remove 30-50% of water from the hydrolyzate to obtain concentrated solution, (d) adding preservative to the aged hydrolyzate obtained in step (b) or concentrated solution obtained in step (c), completely stirring the mixture and uniformly mixing the mixture, where the preservative is one or more chosen from formaldehyde, propanetriol, citric acid and sodium benzoate, preferably propanetriol, and (e) adding plant growth promoter (triacontanol) to the organic slurry obtained in step (d), completely stirring the mixture, subjecting the mixture to ultramicro-homogenization process using colloid mill to obtain first organic plant nutrient solution, and testing and packing the obtained first organic plant nutrient solution, where the slurry is obtained by removing rubber fraction in solidification of natural rubber latex from Hevea brasiliensis, and the slurry comprises water-soluble non-rubber fractions separated from the natural rubber latex, and hydrolyzate is obtained by carrying out natural hydrolysis fermentation in the absence of microorganisms.