  We present the latest results of the searches for new particles in hadronic
final states performed in proton-antiproton collisions at a center of mass
energy of 1.8 TeV. The large data samples collected with the CDF and D0
detectors at the Tevatron collider between 1992 and 1995 allow searches for low
cross section phenomena in dijet and multijet events, despite the hindrance of
the high background from normal QCD processes. However, no signal for new
physics is found, and the data show good agreement with QCD. Limits on the mass
and on the cross section of the searched states can thus be set.
