To solve the problem of weak signal outputing in short-wavelengh staring IRFPA detector，a CTIA input stage is designed.The input stage has high injection efficiency，low noise and compact structure.A CTIA input stage has cascode structure with current-source load.The novel CTIA can overcome the defects of common CTIA，such as large area and high power dissipation.The simulation and verification are accomplished both before and after completing the layout.The circuit structure is analyzed according to CMOS low-temperature model.The novel CTIA ROIC chip fabricated with CSMC-6S05DPTM 0.5μm process technology is measured.The test result is consistent to simulation.The voltage range of output signal reaches 2.5V and circuit unit power is less than 1.0μW.