Rheology of particle filled polymer (PFP) melts is one of the most important subjects in polymer science. PFP melts exhibit diverse complicated rheological phenomena depending on the structure of filler particles

the chemical nature of the polymeric matrix and the interfacial interaction. However

there are also some universal and general rheological rules among diverse experimental systems. The main experimental phenomena and results from theoretical (model) studies involved in dynamic rheology of PFP melts are summarized in this paper. The common views achieved and the scientific controversies remained so far are pointed out after heavily analyzing extensive investigations on the liquid-to-solid transition of PFP melts

the molecular relaxations

the so-called "zero shear rate" viscosity and "equilibrium" shear modulus

the time-concentration superposition principles

the two-phase model and the nonlinear viscoelasticity. Some perspectives on further studies on rheology of PFP melts are given.