Two experiments were conducted to study the effect of rapeseed cake and xylanase application on the digestibility and deposition of nutrients and energy in young broiler chickens. Experiment 1 was carried out on broiler chickens between the ages of 1 to 21 days, which were divided into three groups. The control diet contained soybean meal, whereas in the experimental diets a part of the soybean meal was replaced by 15% of rape cakes. Furthermore, an exogenous enzyme preparation containing xylanase in the amount of 0.2g kg -1 was added to one of the two rapeseed cake diets. Seven 1-day-old chickens at the beginning of the experiment and 6 chickens on day 21 of the experiment were slaughtered in each group and the chemical composition of their bodies was analyzed. In experiment 2, a digestibility test of the diets from experiment 1 was carried out on 2-week-old broiler chickens. The application of 15 % rapeseed cakes and the addition of the enzyme preparation did not significantly influence body weight, feed intake, the chemical composition or the energy content in the chickens , bodies. Differences in the digestibility of the dry matter , ether extract , and crude phosphorus of the diets were statistically significant. The highest digestibility of dry matter, ether extract, and crude phosphorus(P<0.05) was found in the control group. Application of xylanase into the diet containing rapeseed cake increased the digestibility of nutrients, but the differences obtained between the groups were not significant.