The current study was conducted to evaluate of Spanish panicum mombasa (SPM) in Cutting interval (CI) 30 day in weaning Baldi goat's kids performance feeding at 0, 25 and 50% SPM as a replacement of clover hay (CH). There was no significant difference between the treatments in all periods of the experiment in average monthly weight gain . There were no significant differences between animals in the average total weight gain, average daily weight gain and amount of total feed intake between control group (T1)  0% SPM and group fed 25% SPM (T2) for all periods, and the lower daily weight gain was observed in group fed 50%SPM (T3) . No significant diffrence between control group (T1) and (T2) on DM, CP, EE and DCP  comparing with group (T3) was recorded lower digestion coefficients of DM, OM, CP, NFE, TDN  and DCP. groups fed T3 had (P<0.05) higher total serum protein, albumin, A/G ratio , MDA and GPx concentration. While group fed T1(control group) recorded (P<0.05) higher AST, ALT, Triglyceride, urea and creatinine concentration compared with groups fed T2 and T3. No significant differences (P<0.05) in globulin concentrations of plasma among groups fed T1, T2 and T3. However,These values are found to be within the normal range of blood anlysis results. The best relative economic efficiency was significantly (P<0.05) recorded by (T2) being 127.47% when compared with the control group (100%).