Abstract: This study aimed to conduct structural design and parameter optimization of the seed-receiving mechanism in belt-type seed guiding devices under high-frequency seed-metering conditions. Flexible opposed rotary-clamping finger wheels were designed for the mechanism. The rotary-clamping seed-receiving process was analyzed in terms of seed movement in the separation from the seed-metering disk, rotary-clamping acceleration, and seed-cavity entry velocity matching. The velocity required for seed-cavity entry was determined according to operating speed, whereas the theoretical seed-cavity interval count was determined according to target seed spacing. Together, they determined the seed-metering frequency and the available rotary-clamping time. Surface texture affected rotary-clamping acceleration through interfacial friction, whereas hardness affected it through interfacial friction and elastic deformation. The basic dimensions, finger numbers, and arc parameters of the main and auxiliary finger wheels were determined using the equivalent seed circle model and geometric constraints. Finger-wheel thickness was determined according to the mean seed length. Force analysis of surface texture was then conducted to select a transverse texture that suppressed the axial component of texture force during rotary clamping. A full-factorial experiment was conducted with four factors, including operating speed, target seed spacing, finger wheel surface texture, and finger wheel hardness. Seed-cavity interval counts were obtained from the high-speed videos. Analysis of variance (ANOVA) was applied to evaluate the effects and significance of each factor on the qualified index and coefficient of variation of seed-cavity interval count. A seed-spacing performance experiment was conducted under the optimal combination of parameters. The ANOVA results showed that the operating speed, target seed spacing, finger wheel surface texture, and finger wheel hardness had highly significant effects on the qualified index of seed-cavity interval count and the coefficient of variation of seed-cavity interval count (P＜0.01). The influencing factors on the qualified index were ranked in the descending order of the target seed spacing, operating speed, finger wheel hardness, and finger wheel surface texture. The influencing factors on the coefficient of variation were ranked in the descending order of the finger wheel surface texture, finger wheel hardness, target seed spacing, and operating speed. The interaction between finger wheel surface texture and hardness had a highly significant effect on the evaluation indexes (P＜0.01). The optimal combination was transverse texture and a hardness of 60 HA. There was an average qualified index of seed-cavity interval count of 94.54% and an average coefficient of variation of 14.40% at operating speeds of 6–15 km/h and target seed spacings of 150–250 mm. Transverse-textured finger wheels increased the qualified index by an average of 1.18 percentage points, while the coefficient of variation was reduced by an average of 1.19 percentage points, compared with non-textured finger wheels at 60 HA. The improvement and reduction were 2.37 and 0.82 percentage points, respectively, at operating speeds of 12-15 km/h and target seed spacings of 150-200 mm. As such, the optimal combination of parameters was determined from the seed-cavity interval count evaluation indexes. A belt-type seed guiding device was tested using actual seed spacing for validation. The results showed that the qualified index of seed spacing ranged from 92.39% to 99.33%, while the coefficient of variation of seed spacing ranged from 15.50% to 19.28% over the full operating range under the combination of transverse texture and 60 HA hardness. The seed-receiving mechanism maintained stable seed spacing performance under the operating speeds and target seed spacings, indicating the applicability of the transverse-textured finger wheels with a hardness of 60 HA to the tested belt-type corn seed guiding device and operating range. These findings can provide a strong reference for the structural design and parameter optimization of seed-receiving mechanisms for high-speed belt-type guiding devices in the corn seed industry.