Building surface hardness detection device

The utility model relates to a building surface hardness detection device which effectively solves the problem that hardness detection equipment for a high place on the surface of a building is heavy. According to the technical scheme, the device comprises a head part and a rod part, the head part comprises a pneumatic cylinder, a first air pump is installed on the pneumatic cylinder and can control stretching and retracting of the pneumatic cylinder, an installation barrel is fixed to the end of an extension rod of the pneumatic cylinder, and a hardness detector is installed in the installation barrel; a horn-shaped cover body is fixed on a cylinder body of the pneumatic cylinder, the opening direction of the cover body is consistent with the direction of a probe of the hardness detector, a closed cavity is formed in the cover body when the opening of the cover body is pressed on a surface to be detected, an exhaust pipe is arranged on the cover body, a second air pump is arranged on the exhaust pipe, and th