Three kinds of readout integrated circuit for 64×64 InSb IR focal plane array have been designed and fabricated. The circuit ISM64×64-2 works in direct injection and line integration mode. ISM64×64-3 works in the same mode as ISM64×64-2, but was added one sample and hold circuit. ISM64×64-4 works in direct injection and frame integration mode, so the signal to noise was increased greatly. The scheme, operating principle, peculiarities of the layouts, fabrication process, testing methods and performance of the circuits were presented in this paper.