Semiconductor photocatalysis has attracted tremendous attention due to its potential in environment remediation, clean energy production and chemical reaction technology. Pursuing high efficiency is a core task in the field. One of the major factors in photocatalysis is the limited light absorption of photocatalysts in the incident solar spectrum. In this treatise, we will survey the recent advancement of the light-conversion phosphors-based composites including up-conversion, down-conversion, and long afterglow phosphors-based composites for photocatalysis.