[Objective] The function of sloping contour earth bunds with respect to soil and water conservation and environmental enhancement on sloping farmland in a black soil area was investigated in order to provide theoretical support for the use of sloping contour earth bunds on sloping farmland.[Methods] Field experiments were carried out to observe the effects of a sloping contour earth bund on soil erosion, the soil water content, soil temperature, and soil respiration.[Results] ① The sloping contour earth bund had a remarkable effect on reducing the amount of soil erosion in the black soil area; the amount of erosion was 87.53 t/(km²·a), which was less than the allowable amount of erosion. ② Construction of the sloping contour earth bund significantly increased the soil water content (p<0.05) and the vegetation coverage ratio (p<0.01). ③ The soil respiration and soil temperature were significantly correlated in the research area, and the sloping contour earth bund clearly reduced the soil respiration rate and soil carbon loss.[Conclusion] The sloping contour earth bund exhibited remarkable effects for reducing soil erosion, improving the soil water content and temperature conditions, and reducing the soil respiration rate and soil carbon loss; hence, it is suitable for sloping farmland in the black soil area.