Barefoot plane footprint computer program identification algorithm and build system model consistently is one of the key research content in the criminal investigation of image processing. According to the criminal investigation technical requirement and reference relevant technical data, have researched the model of barefoot plane footprint recognition system, have selected and definited Biological characteristics points and characteristics lines of barefoot plane footprint, have proposed the method about feature point positioning and characteristic parameters calculation, and Has been realized the computer programming of interactive Barefoot plane footprint recognition system to use Matlab language, calculated and analyzed the Morphological characteristics parameters error, had been Realized the technology solutions of interaction barefoot plane footprint recognition system. By experiment, the scheme has been fulfilled the actual requirements of criminal investigation technology, can be used as reference about barefoot plane footprint automatic identification system research and technology.