SOURCE

<div class="box">
	<div class="box_1">
		<div class="box_name">
			<div class="name">
				啊是多阿萨
			</div>
			<div class="code">
				1534156345
			</div>
		</div>
	</div>
	<div class="box_2">
		2
	</div>
	<div class="box_3">
		3
	</div>
</div>
<div>---------------</div>
<div class="box">
	<div class="box_1">
		<div class="box_name">
			<div class="name">
				啊是多阿萨dasdasdasdadadadadassadad 
			</div>
			<div class="code">
				1534156345
			</div>
		</div>
	</div>
	<div class="box_2">
		2
	</div>
	<div class="box_3">
		3
	</div>
</div>

.box {
    display: flex;
    background: yellow;
}

.box_1 {
    flex: 1
}

.box_2 {
    width: 300px;
    background: green;
}

.box_3 {
    width: 200px;
    background: red;
}

.box_name {
   width: 100%
}

.name {
    width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.code {}