The utility model relates to an it puts a device in step to open prefabricated track board earlier, its device including the end put a mechanism, be sidelong a mechanism, pump station, electric control cabinet, die positioning device. Wherein, the end is put a mechanism and is had first zhang fangxiang of putting and first adjustment orientation, being sidelong a mechanism and having the second and put zhang fangxiang and the second adjustment orientation, first zhangfangxiang of putting and second are put has predetermined contained angle beta (as 90) between zhangfangxiang, and first adjustment orientation and the second adjustment orientation have predetermined contained angle gamma (as 0), the pump station is put a mechanism and is sidelong a mechanism with the end and is connected to a power that is put and is opened and the adjustment is provided, the electric control cabinet as integral control center put a mechanism with the end, be sidelong a mechanism and the pump station is connected, the die positioning device sets up on the working face, provides the mould and puts the first adjustment orientation of a mechanism and/or be sidelong the ascending location in a the second adjustment side of mechanism corresponding to the end. This device enables to have many reinforcing bars of stretch -draw stress, realizes moving about freely and quickly synchronous evenly steadily putting and opens.