The invention provides an evaluation gene group for prognosis prediction of gastric cancer and a corresponding kit. The evaluation gene group is obtained by screening genes comprised in a RhoA proteinactivity regulation pathway for regulating RhoA protein activity, wherein, the evaluation gene group comprises the following genes: RHOA, ARHGAP32, ARHGAP4, ARHGAP6, ARHGAP9, ARHGEF17, ARHGEF2, ARHGEF3, BCR, CDC42, CDKN1B, DLEC1, FARP1, NET1, NGEF, OBSCN, PRPF38B, SLC6A5, TSPAN1, VAV2, and VAV3.