The toughening masterbatches are used to toughen HDPE, copolymer PP and homopolymer PP, which are prepared from the micron and sub-micron calcium carbonate fillers with the special surface-treatment. The mechanic strength of the composites can be improved significantly and controlled conveniently by the added content of the toughening masterbatches. The impact strength of both the room-temperature and the low-temperature can be increased in the range of 200%-400% and the flexural modulus can be increased in the range of 25%-30%. The toughening masterbatche granules can be mixed easily with the plastic granules. The processabilities of the composites, such as the melt-rheology and the size-stability of the plastic production, can also be improved effectely.