Abstract: This paper discusses some issues on teaching of college physics experiments.Some contents of courses in current teaching are obsolete and divorces from science and technology development,and some general national and international standards are not adopted.Several suggestions are presented to resolve these problems.The newest fundamental physical constants recommended by the committee on data for science and technology（CODATA） in 2006 are suggested to be adopted.According to national standards and scholarly customs,the expression of the uncertainty of measurement is presented.To avoid that significance figure has not a uniform definition and hence lead to ambiguity and misunderstanding,rounding vale with certain rounding interval is proposed to replace significance figure.At last,the criterion of negligible standard deviation is redefined.

Key words: fundamental physical constants, uncertainty, effective number of bits, small standard deviation