1%。The breadth of square baler pickup and roller rotating speed were designed. Simultaneously, contrast analysis on movement parameters of three sets of spring-tooth and four sets of spring tooth and the leakage ratio was carried out in the paper. The results indicated that leakage ratio of three sets of spring-tooth was less than 2% while pasture could avoid being piled up at ground and missed pick-up, and leakage ratio of four sets of spring-tooth was less than 1% .