Daoguanhe Reservoir(30°52'N, 114°59'E)situated in Wuhan, Hubei Province of China, is a middle-sized hilly-lake reservoir built in 1968.X.microlepis is the main fish and made up of 15% of fish product in the reservoir during 1985-1988.But the production of X.microlepis declined in recent years, the fecundity of X.microlepis from Daoguanhe Reservoir was studied for utilizing its resource sustainably during April to May 2001.The scales used as aged material.The indices were measured with the routine method.All data was analyzed with STATISTCA soft Relationship between its' fecundity and indices imitated with 8 kinds of mathematic expressions.One hundred and ten specimens were colleted belonging to the age of 2⁺-5⁺.Relationship between its' absolute fecundity (F) and body length(L), body weight(W) and age(A) could be expressed with the linear, logarithmic and exponential equation, respectively.Relationship between relative fecundity per centimeter(F_L) and body length, body weight and age could be described using the hyperbolic, logarithmic and exponential equation, respectively.The equations (P<0.01) as follow: F=-13.414+0.756 L R²=0.8786 F_L=-1.459+0.521 InL R²=0.7664 F=-29.322+6.326 In W R²=0:8692 F_L=-0.712+0.168 In W R²=0.7626 F=1.012 A^1.266 R²=0.7877 F_L=0.0666 A^0.882 R²=0.6824 The number of felative fecundity per gram mainly ranged from 150-250 and averaged 212.Multi-regressive analyses showed its absolute fecundity and relative fecundity per centimeter were significant related with body weight and maturing coefficient, and relative fecundity per gram(Fw) only with maturing coefficient: F=-2.846+0.0192 W+0.216GSI, (n=110,R²=0.9182,P<0.001) F_W=78.336+8.415 GSI,(n=110, R²=0.4104, P<0.001)