Abstract: The basic meanings and features of reconfigurable computing are first discussed It is pointed out that reconfigurable computing has actually broken out the limitation of the general purpose CPU, which only varies in time dimension, and the limitation of ASIC, which only varies in space dimension Reconfigurable computing can be programmed in both time and space dimension Then described systematically are the basic technologies of hardware structure of reconfigurable computing based on FPGA Emphasis is put on the problems of particle size of logical units and routes between logical units Some typical products are introduced Finally, some typical architectures of reconfigurable computing are given