The invention discloses a device for measuring the inclination angle of a building entity. The device comprises a base and a measuring
assembly, wherein a storage groove is formed in the rear end of the upper surface of the base, magnets are symmetrically arranged on the inner side face of the right end of the storage groove, a rotating shaft is rotationally connected into the right end of the base, an
encoder is installed on the front side of the right end of the base, the front end of the rotating shaft is fixedly connected with the input shaft end of the
encoder, and a gradienter is arranged on the upper surface of the base; and the measuring
assembly is fixedly connected to the rear end of the rotating shaft, and the lower end of the measuring
assembly is located in the storage groove.The device for measuring the inclination angle of the building entity further comprises a storage battery, a display screen and a single-
chip microcomputer, wherein the storage battery is arranged onthe front side surface of the base, the display screen and the single-
chip microcomputer are both arranged at the front end of the upper surface of the base, and the input end of the single-
chip microcomputer is electrically connected with the output end of the storage battery. The device for measuring the inclination angle of the building entity is ingenious in structural design, convenient to fold and store, large in measurement range and high in precision, the practical performance is improved, and popularization and application are facilitated.