NOVELTY - Chemical and biological composting method of trees involves collecting tree branches and stems, selecting flat open terrain for composting, preparing composting materials, measuring moisture content, calculating carbon to nitrogen ratio, regulating humidity, stacking the stem and branches, folding plastic film into concave shape, sprinkling urea solution, covering for few hours, sprinkling ferrous sulfate solution and microbial preservative, re-stacking, covering the stack, compacting, covering with reed mat at night, observing daily, and composting litter.    USE - The method is useful for chemical and biological composting of waste of trees (claimed).    ADVANTAGE - The method reduces humification time as it decomposes and recycles higher amount of arid and semi-arid area tree branches and stem residue rapidly and thus enables effective management of urban garden.    DETAILED DESCRIPTION - Chemical and biological composting method of trees involves (a) collecting tree branches during autumn and spring, collecting trimmed stems and branches, drying in air and storing, (b) crushing the dry branches and stems into 5 cm using a crusher, and mixing, (c) selecting urban fringe to facilitate preparation of materials, venue management and protection, and selecting flat open terrain for composting, (d) preparing the composting materials by sampling, weighing, drying at 65 degrees C to constant weight, measuring the moisture content, analyzing total organic carbon and nitrogen content, calculating total ratio of carbon content of the material to the total nitrogen content (C/N value), and regulating actual C/N value to 25:1 using urea as regulator, and preparing 2% solution of ferrous sulfate (FeSO4), (e) adding 180% urea with respect to dry weight of litter in water, and stirring until urea is completely dissolved, (f) regulating humidity by laying plastic film with thick texture on ground, stacking the stem and branches at a ratio of 2:1, folding the plastic film into concave shape, sprinkling urea solution obtained in step (e), covering with plastic film, compacting and placing for 5-6 hours, and (g) sprinkling FeSO4 solution obtained in step (d), and microbial preservatives that rapidly decomposes straw uniformly over the stack, turning and re-stacking to a height of 1-1.2 m, covering the stack with plastic film, compacting, and covering with reed mat at night, and (h) observing daily at 12:00 am, composting 40 cm deep, maintaining stable temperature, turning the stack every 3-4 days and composting until the material becomes soft and fragile, color becomes deep brown, and humic soil smell is produced.