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Aiming at the industrial hemp mechanized harvesting process, the cutting table operating performance and cutting and laying quality is poor, low efficiency, high failure rate, and high cost，the cutting table is easy to be blocked and the cutter device is easy to be damaged, etc., the theoretical analysis of the harvesting device was carried out, and the ideal hemp dumping rotational speed under the conditions of the hemp stalks were not pushed down or broken and multiple plants were dialed for 107.17~283.09 r/min was obtained. Kinematics and dynamics analysis of the cutter device was done, and a counterweight block was designed to balance the inertia force of the crank,，the mass of the counterweight block was 6.672 kg;based on the response surface analysis method for field tests, the best combination of parameters were as follows：flinging speed was 628.08 r/min,，traveling speed was 7.28 km/h, the cutter speed was 502.73 r/min;at this time, the stalks laying angle, the angle difference and the root difference were respectively 89.02°，5.16° and 17.46 mm;based on the optimal parameter combination, the straw laying angle of the cutting table was 88.20°,，the angle difference was 4.95°, and the root difference was 18.35 mm, and the relative errors with the theoretical optimized values were no more than 4.85%. Field test results showed that the designed cutting table performance parameters met the standard technical requirements, which can achieve better cutting and spreading effects, and can meet the industrial hemp mechanized harvesting requirements.