The present piece of research work was conducted to find out the effect of solidified urea molasses multi-nutrient block (UMMB) on productive performances of indigenous cows and calves. The UMMB may be used as a catalytic feeding to straw based diet of indigenous cows for improving milk production and fertility. About 250 g/h/d solidified UMMB were supplied to 36 indigenous cows. On the contrary, 27 cows were in control group and 27 cows in cake UMMB groups in same village. Data was analyzed of variance in single Randomized Block Design (RBD). The DMRT was used to find out the difference among the mean values. The productive performances of cows viz. live weight changes of cows, calves and condition score of cows were measured monthly. The results of productive performance in control, cake UMMB and solidified UMMB groups showed that live weight changes of cows -34, -3.29 and -51.5 g/d; calves weight gain 55, 90 and 84 g/d (p>0.05), respectively, milk yield (kg/d/cows) 1.34, 1.83 and 1.65 (p>0.05), condition score of cows (1-5 points ranks) 2.30, 2.50 and 2.51 (P>0.05), respectively. So, solidified UMMB may be used for more milk yield, better calf weight gain and better condition score for indigenous cows of village level farming condition of Bangladesh.