The invention belongs to the technical field of aviation and relates to a sliding support for an airplane. The sliding support is characterized by comprising two support bodies (1) with sliding grooves, a clamp (2) with lugs and two installation corner plates (6), wherein the clamp (2) with the lugs are clamped on the outer circumference surface of a conduit; the two lugs of the clamp (2) with the lugs are slidably installed in the sliding grooves of the support bodies (1) with the sliding grooves respectively; the support bodies (1) with the sliding grooves are fixedly installed on the installation corner plates (6) respectively. According to the sliding support for the airplane, the scheme of the support bodies (1) with the sliding grooves and a supporting base is adopted, and the structure is simple; the reliability is high; the maintenance is simple; the safety of the fixation of a pipeline is improved; the limitation that the reliability and the safety of the support are ensured simply through a thickened support material or a strengthened support material is overcome.