The utility model discloses an auto air - conditioning evaporator pipeline seal structure belongs to vehicle air conditioner technical field, locate including the cover evaporator tube cardboard on the road, the cardboard is two lamella formula integrated configurations left side clamp plate and right clamp plate, left side clamp plate is provided with and compresses tightly position I, right side clamp plate is provided with and compresses tightly I combination of position and forms one and compress tightly the space and be used for compressing tightly the pipeline compress tightly the position II, it is provided with elasticity seal I to compress tightly position I, elasticity seal I with compress tightly position I and mould plastics or the double -shot moulding rigid coupling through the secondary, it is provided with elasticity seal II to compress tightly position II, elasticity seal II with compress tightly position II and mould plastics or the double -shot moulding rigid coupling through the secondary. The utility model discloses simple structure has not only reached sealed, shock attenuation and has fallen the effect of making an uproar, can also material saving cost and human cost, and extensive application space has.