Based on a local project of the sintered brick wall reinforced with steel mesh cement mortar, pullout inspection and standard cube compressive strength test were constructed. The field test adopts nine kinds of cement mortar with a strength grade of M10, M15, M20, M25, M30, M35, M40, M45, M50. According to the test results, we have obtained the formula of compressive strength of cement mortar thin layer detected by cast-in-place pullout method，inspected the model of linear regression equation and proposed the interval estimation for the individual value of the compressive strength of cement mortar, This paper provides not only a basis for technology popularization and application of cast-in-place pullout method ,but also a basis of the establishment of relevant technical standards for cement mortar field tests.