SOURCE

const a = new Vue({
    el: '#app',
    data() {
        return {
            page: 0
        }
    },
    methods: {
        pageNext() {
            this.$refs.page.next()
        },
        pagePrev() {
            this.$refs.page.prev()
        }
    }
})

<div id="app">
	<el-pagination ref="page" layout="prev, pager, next" :total="50">
	</el-pagination>

	<el-button @click="pageNext">下一页</el-button>
	<el-button @click="pagePrev">上一页</el-button>
</div>