The invention provides a micro-pore structure evaluation and reservoir classification method for tight reservoirs. The method comprises steps as follows: the origin and the petrologic features of each reservoir are analyzed, and the phase type, the content and the like of each reservoir are determined; physical features of each reservoir are analyzed; features of a reservoir space of each reservoir are observed, and the pore type, the surface porosity and the like are determined; pore structure parameters of the reservoirs are measured with a high-pressure mercury intrusion method and a nitrogen adsorption method; the diagenesis is researched, and compaction, cementation and corrosion sequences are determined; physical property control factors of the reservoirs are analyzed; the reservoirs are classified. The method mainly has the effects as follows: the diagenesis and the influences of the diagenesis on the reservoirs are comprehensively reflected through cathode luminescence and micro-area mineral quantitative analysis; micro pores of the tight reservoirs are researched elaborately through fluorescent casting and field emission scanning electron microscopy; the microscopic features of the tight reservoirs are determined accurately through high-pressure mercury intrusion experiments and the nitrogen adsorption experiments; the parameters are optimized for classification and evaluation of the reservoirs, and the method has a great significance in further prediction of beneficial developing stratums or zones.