介绍了用于铁路轨道施工中的现场钢轨联合接头焊接公铁两用车。它利用车体的垂向支撑系统把全车支撑起来,收起轨道行走引导轮,车落下,走形轮就可平稳地与平交道口接触,然后离开轨道,行走在公路上,自行运输、转场;车自行到公路和轨道的平交道口处,车顺着轨道方向就位在轨道上,利用车体的垂向支撑系统将车辆支撑起来,放下轨道行走引导轮,然后将车落下,走形轮胎落在轨面上,车又可沿轨道行走到作业位置进行焊轨作业。最后介绍了使用中的安全措施。 This paper introduces the welding of rail and railroad car for railway rail joint. It uses the body’s vertical support system to support the entire car, put away the track walking guide wheel, the car down, take the wheel can be smooth and level crossing contact, and then leave the track, walking on the road, transport themselves, Transition; car to their own roads and rails at the level crossing, the car along the track in the direction of the track, the use of car body vertical support system to support the vehicle up and down the track to guide the guide wheel, and then the car fell, Walking tire falls on the rail surface, the car can walk along the track to the job site welding track operations. Finally introduced the use of security measures.