To meet the needs of research on new fast scintillation materials, the home-made pulsed X-ray facility for fluorescents lifetime measurement was upgraded by using microchannel plate photomultiplier tube (MCP-PMT), fast preamplifier (FPA) and fast constant-fraction discriminator (CFD). The time resolution of the facility is improved to about 170ps. The decay time measurement of the fast scintillation component in BaF2 crystal shows that the facility can be well adequate to the research on decay times of fast scintillation materials.