Fuente: WIPO "tomato" Use of a soybean protein phosphatase family gene GmPP2C11 is provided. A soybean gene GmPP2C11 encoding a GmPP2C11 protein has the nucleotide sequence of SEQ ID NO: 1. A PSCM-GmPP2C11 knockout vector is genetically transformed into soybean, and it is found that a resulting gene-edited material shows significantly higher hundred-seed weight and yield per plant than those of a receptor Jack. This indicates that the soybean gene GmPP2C11 encoding the soybean GmPP2C11 protein may increase the seed weight and yield of a plant through genetic engineering, thereby providing technical services for increasing the yield of crops, especially soybean.