<div ng-app="myApp" ng-controller="myCtrl">
  <label ng-repeat="checkbox in checkboxes">
    <input type="checkbox" ng-model="checkbox.checked"> {{checkbox.label}}
  </label>
  <button ng-click="cancelSelection()">取消选中</button>
</div>

angular.module('myApp', [])
  .controller('myCtrl', function($scope) {
    $scope.checkboxes = [
      { label: '复选框1', checked: false },
      { label: '复选框2', checked: false },
      { label: '复选框3', checked: false }
    ];

    $scope.cancelSelection = function() {
      angular.forEach($scope.checkboxes, function(checkbox) {
        checkbox.checked = false;
      });
    };
  });