Current target recognition method application platform is difficult to achieve small size and low cost, the detection imaging of the laser fuze is obtained by the line scanning. The sample matrix of the DHGF algorithm is obtained, and a quaternary evaluation algorithm based on laser line scanning imaging fuze is established for recognition model of typical target, which uses Delphi method to determine target contour similarity index set. Analytic hierarchy process (AHP) is adopted to determine the index weight distribution, and grey system theory is applied to determine evaluation gray level to get single factor fuzzy evaluation matrix. Fuzzy mathematics theory is applied to evaluate target recognition results. The algorithm overcomes the ambiguity and uncertainty in target recognition process in the case of small sample data. The simulation of a typical target is completed, and the simulation results show that the proposed algorithm has ability to recognize typical targets. The research can provide a reference to laser scanning imaging target recognition.