Abstract: 【Objective】 Through the comparison of the early growth and development law of the offspring of different generations of hybrid combinations of Texel Sheep and Kazak sheep, this project aims to screen the hybrid combinations with fast growth and significant weight gain in the early stage, and to determine the optimal cross fixation mode, so as to provide a theoretical basis for screening new types of meat breeding of Kazak sheep. 【Methods】 Based on the previous studies of Kazak sheep, the body weight of four different hybrid combinations (Texel Sheep× F₁, F₂ × F₁, F₂ × Kazakh sheep, F₁ × F₂), a total of 1,193 singleton lambs from birth to 180 days of age was measured and their cumulative growth, absolute growth and relative growth were fit and compared by using Logistic, Gompertz and Von Bertalanffy nonlinear fitting models, from which, the crosses with the best early growth performance were selected and the optimal regression equation established and the growth curve drawn. 【Results】 From birth to 180 days of age in lambs of different hybrid combinations, F₂ × F₁ hybrid lambs have fast growth speed, high growth intensity, significant weight gain, and can reach the inflection point weight faster when the inflection point weight is higher.Texel×F₁, F₂×Kazakh Hybrid lambs followed.In contrast, F₁×F₂ hybrid lambs have slower growth and development speed, lower growth intensity, and the body weight is significantly lower than other hybrid combinations of the same age.Although the male lambs has a high inflection point body weight, it takes too long to reach this body weight. 【Conclusion】 Through screening, it is considered that the hybridized combination with the best early growth and development performance is F₂ × F₁.