The utility model relates to an utilize loaded heavy sleeping carriage reliability test device of finite element method, the package belongs to the machinery test equipment field. Including the heavy sleeping carriage that the quilt was surveyed, loading system has been constituteed to two above loading units for the gravity load of the various shape work pieces that heavy sleeping carriage received simulates, two above loading units pass through the spill, and bolt fixed connection is on the guide rail of heavy sleeping carriage for the base, and the centre gripping is distinguished between the three -jaw chuck and tailstock of heavy sleeping carriage in arc centre gripping unit, both ends that standard work piece passed on the loading unit. The advantage is through applying the different pressure that draws to every loading unit, simulate different thicknesses, and the work piece of different shapes is to the load of heavy sleeping carriage, and the length at the different positions of work piece that the quantity of arc centre gripping unit can be simulated is as required adjusted, applys uniformly distributed load for the work piece, the change of weight in the dead weight of furthest simulation work piece and the course of working.