Как насчет чего-то подобного в качестве отправной точки.
HTML
<div class="container main-form">
<div class="row">
<div class="col-xs-12 col-sm-6 col-md-6 col-lg-6 custom-col">
<div class="p-5">
<form>
<div class="form-group">
<label for="exampleFormControlInput1">Email address</label>
<input type="email" class="form-control" id="exampleFormControlInput1" placeholder="name@example.com">
</div>
<div class="form-group">
<label for="exampleFormControlSelect1">Example select</label>
<select class="form-control" id="exampleFormControlSelect1">
<option>1</option>
<option>2</option>
<option>3</option>
<option>4</option>
<option>5</option>
</select>
</div>
<div class="form-group">
<label for="exampleFormControlSelect2">Example multiple select</label>
<select multiple class="form-control" id="exampleFormControlSelect2">
<option>1</option>
<option>2</option>
<option>3</option>
<option>4</option>
<option>5</option>
</select>
</div>
<div class="form-group">
<label for="exampleFormControlTextarea1">Example textarea</label>
<textarea class="form-control" id="exampleFormControlTextarea1" rows="3"></textarea>
</div>
<div class="row justify-content-center align-items-center">
<button class="btn btn-primary" type="submit">Button</button>
</div>
</form>
</div>
</div>
<div class="col-xs-12 col-sm-6 col-md-6 col-lg-6 custom-col">
<div class="p-5">
<form>
<div class="form-group">
<label for="exampleFormControlInput1">Email address</label>
<input type="email" class="form-control" id="exampleFormControlInput1" placeholder="name@example.com">
</div>
<div class="form-group">
<label for="exampleFormControlSelect1">Example select</label>
<select class="form-control" id="exampleFormControlSelect1">
<option>1</option>
<option>2</option>
<option>3</option>
<option>4</option>
<option>5</option>
</select>
</div>
<div class="form-group">
<label for="exampleFormControlSelect2">Example multiple select</label>
<select multiple class="form-control" id="exampleFormControlSelect2">
<option>1</option>
<option>2</option>
<option>3</option>
<option>4</option>
<option>5</option>
</select>
</div>
<div class="form-group">
<label for="exampleFormControlTextarea1">Example textarea</label>
<textarea class="form-control" id="exampleFormControlTextarea1" rows="3"></textarea>
</div>
<div class="row justify-content-center align-items-center">
<button class="btn btn-primary" type="submit">Button</button>
</div>
</form>
</div>
</div>
</div>
</div>
CSS
.main-form {
margin-top: 30px;
}
.custom-col {
border : 2px solid #ccc;
background-color : #eee;
}
Ссылка на перо
https://codepen.io/anjanasilva/pen/dgMggQ
Надеюсь, это поможет.Спасибо.