A novel infrared-sensitive streak image tube with a combined infrared photocathode and elec-trostatics focused electronic optical system is described. Using the characteristics of electron trapping material (ETM) for the rapid infrared up-conversion , a kind of combined infrared photocathode is made by coupling ETM-based infrared up-conversion screen with visible photocathode. The novel infrared-sensitive streak image tube is able to extend spectral sensitivity to 800~1600 nm. The peak value of the converting efficiency is located at 1165 nm. Time resolution is superior to 15 ps.