The invention discloses a maintenance method for city vehicle body, which is characterized in that the method comprises the following steps: S1, pre-inspecting a train to be repaired; 2, decomposing and cleaning that train in S1; S3, further disassembling the vehicle body parts of the train completing S2; S4, sending the main parts of the vehicle body disassembled in the step S3 to the corresponding professional department for inspection and repair; S5: After passing the inspection, each component is reinstalled on the corresponding municipal vehicle body to complete the vehicle body inspection and repair. As that vehicle body component are removed first, a method for mounting the vehicle body after the detection is completed comprises the following steps: a through-road is arranged in thevehicle body; the main components in the interior facilities, door system, cab and air conditioning and ventilation system are disassembled and sent to the corresponding professional inspection and repair department for inspection and repair. The aintenance method for city vehicle body comprehensively detects the components in the vehicle body, which not only improves the inspection and repair efficiency, but also ensures the inspection and repair quality and accuracy.