The invention belongs to the technical field of an automobile part processing tooling, and provides a special machine for pushing an automobile seat slide rail to be loose and testing sliding force. The machine comprises a machine platform, a push loose sliding mechanism, a product placement limiting mechanism and a sliding force testing mechanism, wherein the push loose sliding mechanism comprises a crank motor, a push loose sliding plate, a push loose sliding track, a crank rocker component and a pressing location component. The machine has the advantages that the machine is simple in structure and convenient to operate; the aim of push loose can be automatically achieved by the push loose sliding mechanism; after push loose, the machine can detect the sliding test force between seat slide rails, which are pushed to be loose, in real time so as to detect whether the sliding test force is qualified or not, so that the detection is more standard and accurate, and artificial interference factors in the detection process can be avoided; the detection efficiency in the whole detection process is high, and detected sliding test force data can be conveniently checked and stored.