Mexican sheep meat production covers only 56.52% of its demand; thus, an alternative to the national sheep production shortage is intensive completion based on the supply of potential of byproducts, additives and minerals that could be included in the diets for intensive fed sheep to reduce the finishing time. Clinoptilolite zeolite are hidrated alcaline aluminosilicates with known capacity of increasing digestion time, thus increasing the digestive efficiency of feed nutrients. To determine the effect of the addition of 4 increasing levels of zeolite (0, 1.5, 3.0, 4.5%) in completely mixed diets for sheep on growth performance and carcass characteristics, 40 male sheep 1/4 Kathadin × 3/4 pelibuey were used. According to a randomized complete block design, sheep were grouped into 5 blocks with 4 pens each and each treatment randomly sorted into each block. The test lasted 75 d and weighings were carried at 28, 56 and 75 d respectively. The treatments used were: T1) 0% Zeolite (16.5% CP and 1.38 Mcal / kg ME), T2) 1.5% Zeolite (16.0% CP and 1.35 Mcal / kg ME), T3) 3% Zeolite (16.5% CP and 1.32 Mcal / kg ME) and T4) 4.5% zeolite (15.1% CP and 1.29 Mcal / kg ME). The feed was offered in twice a day at 8:00 and 14:30, adjusted to 3.0% of their initial body weight amount and gradually adjusted based on the excess or shortage of existing food the next day. Feed was served in a 40:60 ratio in the morning and afternoon respectively. At the end of the trial animals were killed, and 24 h after slaughter carcass data were obtained. In the productive performance data, no effect in final weight (P = 0.50), daily weight gain (P = 0.50) and dry matter intake (P = 0.08) was observed due to the effect of addition of zeolite. Also, no effect owed to zeolite added to diet was observed in HCW (P = 0.98) or rib-eye area (P = 0.64). It is concluded that clinoptilolite zeolite can be replaced up to 4.5% in substitution of corn and soybean, ingredients of high economic impact, with no significant effect in productive of carcass variables.