使用 .filter获取与当前值相似的选项元素.

Use .filter to get option-elements having value similar as current value.

$('select').on('change', function() {
  $('option').prop('disabled', false); //reset all the disabled options on every change event
  $('select').each(function() { //loop through all the select elements
    var val = this.value;
    $('select').not(this).find('option').filter(function() { //filter option elements having value as selected option
      return this.value === val;
    }).prop('disabled', true); //disable those option elements
  });
}).change(); //trihgger change handler initially!

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
<select name="box1" id="box1">
  <option value="One">One</option>
  <option value="Two">Two</option>
  <option value="Three">Three</option>
</select>

<select name="box2" id="box2">
  <option value="Two">Two</option>
  <option value="One">One</option>
  <option value="Three">Three</option>
  <option value="Life">Life</option>
</select>

<select name="box3" id="box3">
  <option value="Life">Life</option>
  <option value="One">One</option>
  <option value="Two">Two</option>
</select>