Abstract: Reservoir physical properties change with the changes of various conditions, and then the relative parameters will change, which is called sensitivity phenomena and will impact oil and gas production. Conventional evaluation methods and criteria are not in good accordance with production practice, which needs to be further discussed and improved. The study results of this paper shows that the level of reservoir sensitivity can be expressed by the loss ratio of rock permeability and the evaluation standards can be changed from 0.3 and 0.7 to 0.1 and 0.3, respectively. Water sensitivity is the extreme situation of salt sensitivity, so salt sensitivity evaluation includes water sensitivity evaluation. Stress sensitivity of tight reservoirs is quite weak, which causes negligible influences on production. Stress sensitivity of unconsolidated reservoirs is in favor of oil displacement, but its laboratory evaluation is very difficult. Velocity sensitivity is a false concept and belongs to experimental artifacts, which can not reveal the real sensitivity of reservoir rocks and may misguide the production practice. Permeability of rocks is very sensitive to the grain size of solid particles carried within the injected water, which must be evaluated properly. The conventional 5-item sensitivity evaluations can be changed to the 4-item sensitivity evaluations, namely sensitivities to salt, acid, alkali and grain size.