Polymer dispersion liquid crystal (PDLC),as a new type of display material,simple preparation process and high performance,make it occupy an important position in the field of optoelectronic display,and has received wide attention and research. The type and content of liquid crystal molecules and prepolymers are crucial to modulate the microscopic morphology and electro-optical properties of PDLC. The size of liquid crystal droplets dispersed in the polymer network affects the driving voltage of PDLC,while the selection of polymeric monomers directly affects the size of liquid crystal droplets. The effects of (meth)acrylate monomers,thiol/polythiol monomers,and the common additives as polymer components on the PDLC microscopic morphology as well as the driving voltage and contrast are mainly reviewed in this paper according to the different types of prepolymers. And the process of variation of liquid crystal micro-drop morphology caused by polymer networks,which in turn affects electro-optical properties,is explained in detail.