A method for recycling waste plastic materials and using this recycled plastic in composite material production, comprises the steps of; - Releasing a number of types of compressed thermoplastic waste materials by feeding into a bale opening machine, - Feeding the waste plastic materials into a separation unit and in there separation from rocks, earth, sand and other coarse foreign materials, - Feeding the waste plastic material into the cutting machine, cutting the waste plastic material into small pieces through high speed blades and at the same time washing by injecting water into the machine, - Feeding the waste plastic materials cut into small pieces to a muddy water separation machine and separation of slimed material from the muddy water by centrifugal forces, - Transferring the waste plastic material into a pool filled with water, rinsing in there and at the same time precipitation of sand and other heavy materials that may have left on it, - Transferring the waste plastic material into the organic contamination separation machine and here cleaning of the oil and other organic foreign materials on the waste plastic material that can not be removed in the previous processes by centrifugal forces. - Transferring the waste plastic material to the water separation machine and there separating the water and moisture on the material by centrifugal forces, - Storing the waste plastic material by transferring to storage silos, - Transferring the waste plastic material into the drying machine and here drying the waste plastic material by heating and at the same time powdering it by crinkling for easy feeding to machines in the future processes, - Storing the dried and crinkled waste plastic material by transferring to storage silos, - Transferring the waste plastic material to the horizontal reactor, - Heating the waste plastic material in the horizontal reactor until it melts under pressure up to 350 °C temperature, characterized in that, the method also comprises the steps of; - Adding the painter and the compatibilizer chemical materials to the waste plastic material melted in the horizontal reactor through a side feeding unit, - Adding mineral materials, through another side feeding unit in the horizontal reactor, to the melted waste plastic material in which painter and compatibilizer chemical materials have been added, - Further bearing and mixing the melted waste plastic material with the additives, - Immediately pouring the melted composite material free flowing from the horizontal reactor into the independent detached molds before it cools down and cooling under pressure by compression inside the molds by means of individual hydraulic presses. - Releasing a number of types of compressed thermoplastic waste materials by feeding into a bale opening machine, - Feeding the waste plastic materials into a separation unit and in there separation from rocks, earth, sand and other coarse foreign materials, - Feeding the waste plastic material into the cutting machine, cutting the waste plastic material into small pieces through high speed blades and at the same time washing by injecting water into the machine, - Feeding the waste plastic materials cut into small pieces to a muddy water separation machine and separation of slimed material from the muddy water by centrifugal forces, - Transferring the waste plastic material into a pool filled with water, rinsing in there and at the same time precipitation of sand and other heavy materials that may have left on it, - Transferring the waste plastic material into the organic contamination separation machine and here cleaning of the oil and other organic foreign materials on the waste plastic material that can not be removed in the previous processes by centrifugal forces. - Transferring the waste plastic material to the water separation machine and there separating the water and moisture on the material by centrifugal forces, - Storing the waste plastic material by transferring to storage silos, - Transferring the waste plastic material into the drying machine and here drying the waste plastic material by heating and at the same time powdering it by crinkling for easy feeding to machines in the future processes, - Storing the dried and crinkled waste plastic material by transferring to storage silos, - Transferring the waste plastic material to the horizontal reactor, - Heating the waste plastic material in the horizontal reactor until it melts under pressure up to 350 °C temperature, - Adding the painter and the compatibilizer chemical materials to the waste plastic material melted in the horizontal reactor through a side feeding unit, - Adding mineral materials, through another side feeding unit in the horizontal reactor, to the melted waste plastic material in which painter and compatibilizer chemical materials have been added, - Further bearing and mixing the melted waste plastic material with the additives, - Immediately pouring the melted composite material free flowing from the horizontal reactor into the independent detached molds before it cools down and cooling under pressure by compression inside the molds by means of individual hydraulic presses.