Variations in sedimentation rate within the deep-lacustrine settings recorded abundant information about the paleoclimate and paleo-lake-level fluctuations. During the Late Triassic, the Ordos Basin was a large intracratonic depression lacustrine basin. Moreover, the Chang 7 Member preserves a complete deep-lacustrine record. Analyzing the variations in sedimentation rate of the Chang 7 Member not only could enhances understanding of the coupling relationship with controlling factors like lake-level changes, but also holds implications for hydrocarbon exploration. Focusing on Well Zhang 22 located in the center of the deep lake, a high-resolution chronological framework was established (237.51-241.56Ma) for the Chang 7 Member. And then, sedimentation rates were calculated, and a depositional noise model was used to reconstruct the lake-level curve of the Chang 7 Member. Integrated with geochemical indicators, the main controlling factors of the variations in sedimentation rate of the Chang 7 Member were revealed. Paleoclimate, by regulating sediment supply and lakelevel changes, jointly control the variations in sedimentation rate. Warm climates promote lake-level rise and reduce sedimentation rates during the depositional period of the Chang 7 Member, but arid climates have the opposite effect. Sedimentation rate variations reflect the dynamic equilibrium among paleoclimate, lake-level, and sediment supply, providing insights for shale oil exploration in future.