NOVELTY - A copper-zinc tin sulfur powder materials producing method involves pre-treating copper, zinc sulfide, tin oxide and sulfur, and sieving pre-treated copper, zinc sulfide, tin oxide and sulfur impurity. Copper, zinc sulfide, tin oxide and sulfur are mixed under mechanical agitation. Additive of polyvinyl butyral and formulated ethanol are added to the mixed solution, stirred by an ultrasonic condition for 20-60 minutes, and put into to granulator to granulate. The granulated product is dried. The dried product is put in a reactor and heated followed by cooling, pulverizing and screening.    USE - Method for producing copper-zinc tin sulfur powder materials that are utilized for thin film photovoltaic solar cells(claimed).    ADVANTAGE - The method enables producing copper-zinc tin sulfur powder materials with low-carbon and increased product quality in simple, easy, cost-effective and eco-friendly manner.    DETAILED DESCRIPTION - A copper-zinc tin sulfur powder materials producing method involves pre-treating copper, zinc sulfide, tin oxide and sulfur with a molar ratio of 2:1:1:4-5, and sieving pre-treated copper, zinc sulfide, tin oxide and sulfur impurity. Copper, zinc sulfide, tin oxide and sulfur are mixed under mechanical agitation for 30-100 minutes in an air atmosphere or under an inert gas atmosphere. Additive of polyvinyl butyral and formulated ethanol are added to the mixed solution, where the concentration of the additive in the solution is 1-6%, sufficiently stirred by an ultrasonic condition for 20-60 minutes, and put into to granulator to granulate. The granulated product is put in a dryer for drying at 60-100 degrees C under argon protection. The dried product is put in a reactor and heated under argon at 350-1100 degrees C (low temperature zone of 350-480 degrees C and 500-880 degrees C and high temperature zone of 900-1100 degrees C) for 3-10 hours. Abrasive reaction is cooled and pulverized abrasive until a particle size is less than 100 microns followed by vibration screening of vibration sieve abrasive particle size of product to obtain different size fractions of copper-zinc tin sulfur powder material.