The invention relates to a railway construction sleeper automatic distributing car, including two mobile devices, a lifting cylinder, a Dispersion device and connecting plate, left-right symmetrical arrangement of the two mobile devices is achieved., A lift cylinder is installed on that upper end of the moving device, At that top end of the lift cylinder, a spreading device is installed, A link plate is connected between that spreading device, The moving device comprises a base plate, a mounting plate No. 1, a mounting plate No. 2, a rotating cylinder, an adjusting cylinder, a working plate, alimiting plate, a limiting block and a limiting cylinder, and the spreading device comprises a mounting bracket, a bearing bracket, a pushing cylinder, an adjusting bracket, a partition bracket, a sliding plate, a fixing plate, an adjusting sleeve, an adjusting screw, an adjusting gear, a mounting support plate and a rotating electric machine. The invention can solve the problems of low dispersion precision, large subsequent adjustment workload, low work efficiency and poor adjustability existing in the dispersion process of the existing sleeper, and can realize the function of automatic dispersion of the sleeper.