Concrete surface flatness detection device

The utility model relates to a concrete surface flatness detection device, and relates to the technical field of road surface flatness measurement equipment, the concrete surface flatness detection device comprises a supporting seat and a telescopic probe, the upper end face of the supporting seat is provided with a penetrating opening for the telescopic probe to penetrate, and the telescopic probe comprises a measuring pipe body, a connecting spring and a measuring probe penetrating one end of the measuring pipe body; a sliding block is fixedly connected to the side wall of the measuring tube body, a first sliding groove for sliding connection of the sliding block is formed in the side wall, facing the telescopic probe, of the supporting base, the two ends of the connecting spring are fixedly connected to the measuring probe and the measuring tube body respectively, and the connecting spring has the tendency to drive the measuring probe to be away from the measuring tube body in the natural state. The end, a