1. A general digital semantic database for mechanical language translation, characterized in that all words are decomposed according to part-of-speech characteristics and semantic characteristics to form basic semantic points which could not be further decomposed; and the basic semantic points are categorized and arranged orderly in sequence according to semantic characteristics, part-of-speech characteristics, contextual backgrounds and syntactic relationships; and two or more languages are configured at the basic semantic points according to synonym relationships; and free interchange between languages is performed by using a machine according to basic semantic points; and according to grammatical rules and commands of syntactic formulae, the machine could perform rearrangement in sequence by using the semantic meanings of various languages configured in the semantic database and formulae of syntactic relationships so as to accomplish automatic translation that fits language patterns of various different languages.