Abstract: The method for evaluation of uncertainty on measurement results for tensile test was modified in GB/T 228.1—2010standard.Basing on testing the tensile capability of steel plate, the uncertainty of measurement resultsfor proof strength of total elongation performance and tensile strength performance was evaluated, the source ofuncertainty was analyzed, the outliers of the measurement results was rejected, a feasible method of evaluation ofuncertainty on measurement results for tensile test was provided, and several problems raised in the process ofevaluation were discussed.