This experiment was conducted to investigate the protein deposition efficiency and intestinal digestible crude protein (IDCP) requirement (rIDCP) of growing Qinchuan cattle. Thirty healthy growing bulls of Qinchuan cattle with similar body weight were selected and randomly divided into 5 groups with 6 heads in each group. Cattle were fed 5 diets with different levels of IDCP which were formulated according to the rIDCP at an expected weight gain of 0.9 kg/d, and dietary IDCP levels were 75.0% (group Ⅰ), 87.5% (group Ⅱ), 100.0% (group Ⅲ), 112.5% (group Ⅳ) and 125.0% (group Ⅴ), respectively. Feeding test and digestion and metabolism test were carried out to measure the growth performance and protein deposition efficiency of growing Qinchuan cattle, and to build the models for predicting crude protein (CP) requirement (rCP) and rIDCP. Pre-test period was 10 days, feeding test period was 42 days, and digestion and metabolism test was 4 days. The results showed as follows: 1) there was positive linear correlation between average daily gain (ADG) and CP intake (R²=0.928, P<0.05), and between ADG and IDCP intake (R²=0.912, P<0.05); feed to gain ratio in groups Ⅳ andⅤ was significantly higher than that in the other groups (P<0.05). 2) With the increase of dietary IDCP level, nitrogen intake, nitrogen retention, fecal nitrogen, urinary nitrogen, nitrogen deposition rate and nitrogen apparent digestibility were increased, and there were significant differences in nitrogen intake and nitrogen retention among all groups (P<0.05), while there was no significant differences in fecal nitrogen, urinary nitrogen, nitrogen deposition rate and nitrogen apparent digestibility between groups Ⅳ and Ⅴ (P>0.05). In conclusion, there is a positive linear correlation between ADG and IDCP intake of Qinchuan cattle; the increase of dietary IDCP level is helped for improving protein deposition efficiency of Qinchuan cattle; the rCP and rIDCP for growing Qinchuan cattle can be estimated by the following equations: rCP (g/d) = 5.94×W^0.75 (kg) + 470.84×ADG (kg/d) (R²=0.937, P<0.05); rIDCP (g/d)=3.71×W^0.75 (kg)+285.22×ADG (kg/d) (R² = 0.942, P<0.05) (W^0.75 is metabolic weight). The rCP and rIDCP for maintenance of growing Qinchuan cattle are 5.94 and 3.71 g/(kgW^0.75·d), respectively. The rCP and rIDCP for per kilogram of weight gain of growing Qinchuan cattle are 470.84 and 285.22 g, respectively.