Silicon photoelectric multiplier tuber(SPMT)is made of silicon chip,which can collect weak optical signal(Fig.1).When visible light irradiates SPMT,SPMT can change optical signal to electrical signal.The electrical signal size can be obtained through detecting optical signal size.When putting plastic scintillator before Silicon visible multiplier tuber (SPMT) is made of silicon chip, which can collect weak optical signal (Fig.1) .When visible light irradiator SPMT, SPMT can change optical signal to electrical signal.The electrical signal size can be obtained through detecting optical signal size.When putting plastic scintillator before