In this paper, 90W-7Ni-3Fe heavy alloy thin plate, with the thickness less than 0.1 mm,was prepared by the process of tape-casting, laminating, rubber discharging, sintering and cold rolling. Scanning electron microscope was used to observe the tapes.The mixed metal particles were evenly distributed in the binder. Comprehensive thermal analysis is carried out to get the binder remove scheme. The result of the carbon / sulfur analysis showed that the binder in WNiFe alloy is almost removed, the carbon content is 0.012-0.018wt%. By analyzing the morphology,relative density and hardness of 90W-7Ni-3Fe plates with different sintering temperatures, it was investigated that when the sintering temperature at 1450℃, the degree of densification was increased and the grain size of W was not grown too large. The sintered 90W-7Ni-3Fe plates were treated by cold rolling, the W grains were elongated into the oblate ellipsoidal shape along the rolling direction, and the Ni-Fe phase which has better toughness than W grains was also stretched and lengthened in the rolling direction, pores were eliminated. the density and hardness of the plate were effectively increased.