Abstract: In order to discuss the fracture development law of the coal reservoir,a tectonodynamics evaluation method and technical process of the fracture developme nt law were set up.Based on a basic idea there was a genetic relationship between coalbed methane and rock fracture development under the same tectonic background,wi th the measurement and analysis on the great joint data of the site seam and rock strata,the differences and inherent relations of the lithology joint developments in differe nt rock strata were revealed.The fracture development prediction model of the coal reservoir was set up.The prediction and evaluation were conducted on the fracture deve lopment inhomogeneity and the distribution law of No.5 coal reservoir in EOdong Daning-Jixian Block and the fracture development inhomogeneity affected to the permeabi lity was discussed.The study results showed that the tectonodynamics was an effective method to the prediction and evaluation of the fracture development in the coal rese rvoir.