We pointed out that during the test teaching, the different standard should be comprehensively applied during the design experiment, the ability training to make comprehensive use of the various knowledge and skill should be paid more attention, and good habits for experiments should be developed, such as correctly modification, careful observation, complete records, and paying more attention to the scrupulousness of experimental process or operation. Finally, the 60 groups of mix proportion designed by undergraduates were discussed. The results shows that a part of parameters recommended by standard can be altered, such as the lower limit of water content in unit volume should be lowered to 140 kg/m3 or 145 kg/m3, and the upper limit of volume fraction of sand in mortar could be increased to 0.48. The results can provide a reference for improving the accuracy of research results and the level of experimental teaching.