Abstract: Philosopher Quine cntilized logical empiricism s dogma-the absolute division of analytical proposition and synthetical proposition, and he explained the dialectical relations between analysis and synthesis , indution and deduction and rational knowledge perceptual knowledge . But we think there are stiu some differences between analytical prososition and synthetical propositim understanding it will be of help to the seeking of truth .

Key words: analyticalproposition（truth）, syntheticalproposition（truth）, logicalempiricism