The utility model provides a road surface distance detecting means. Road surface distance detecting means is called as the machinery car of finding range again, and digital display measuring wheel andmeasuring wheel extensively are used for road survey and drawing operation, road engineering, pipeline installation engineering, etc. The measurement and the aassessment of construction operation. Aroad surface distance detecting means which constitutes and includes: link (1), measuring wheel (2) and auxiliary wheel (3), the one end of link is passed through bolt assembly and is connected with the core wheel of measuring wheel, the opposite side of the core wheel of measuring wheel passes through bolt assembly and is connected with curved bar (4) one end of z shape strcture, the other end ofz shape strcture's curved bar passes through path bolt assembly and is connected with the auxiliary wheel, the inboard of link is provided with a pair of parallel configuration otic placode (5), theotic placode is connected with connection mode spike (6) one end through the round pin axle, another pot head of connection mode spike is in the L type plug -in components (7) of handle (13) below, Ltype plug -in components are connected with the handle. The utility model discloses be applied to road detection.