Abstract: To study effects of Sugar/Urea feeding bricks in Simmental cross-bulls, the experiment was conducted using total of 20 bulls. These bulls were randomly divided into four groups and intensively fatten for 45 days. Experiment groups fed on Sugar/Urea feeding Bricks and slightly stored straw, Sugar/Urea feeding bricks and ordinary wheatgrass, slightly Stored straw, respectively and control group fed on ordinary wheatgrass .The result show that average daily gain of three experimental groups is more 707g, 505g, 383g than control group and increased by 550%,450% and 344% ,respectively. So the gain effect on experimental groups was evidently higher than that of control group(P<0.01) through F Test. There was no significant diversity between groupⅠ and groupⅡ (P>0.05), also no significant diversity in groupⅡ and group Ⅲ (P>0.05).But groupⅠis more 324g than groupⅢ in average daily gain and improved by 60% and has a significant diversity(P<0.05) .It suggested that Sugar/Urea feeding bricks will contribute to digest and make full use of cropstraw. Meanwhile, experimental groupⅠ and groupⅡ are more faster in weighting than groupⅢ and control group and have evidently economic benefits.