It’s necessary and feasible for road sweeper to maintain working City Road maintenance initiative maintenance work on the road.The necessity and feasibility of road sweeper preventive maintenance, preventive maintenance program is also often used for city road of the applicability of the proposed method, the development of preventive maintenance, and points out that the selection of preventive maintenance method is scientific and feasible, can improve the energy and economy of the road. Through the analysis of the causes of asphalt pavement pits and repair countermeasure of common, proposed using microwave as heat source material to fill the pit, and the influence of rate, before and after microwave heating asphalt mixture uniformity and heating on the performance of asphalt mixture was studied by experiment, micro wave heating fill material for the conclusion, finally the process of microwave thermal material repair. Along with the people to the traffic environment, the inspection wells surrounding pavement subsidence problems immediately highlighted. Reasons, prevention recommendations to solve the problem, as well as the case of successful treatment, respectively, are discussed in detail. Particularly puts forward the following 2 suggestions to control this problem: 1) inspection wells reinforced concrete floor to take compulsory prefabricated measures; 2) technology will precede the pavement construction up inspection well, instead of pavement construction after the completion of inspection wells up, C30 will be solid concrete manhole ring to black steel fiber concrete C50, and pour the flush with the road.