var cd = 60;

var toDo = function() {

    cd--;

    $scope.countDown = "重新获取 " + cd;

};

$interval(toDo, 1000, 60);

 <form name="form" class="form-validation">

          <div class="list-group list-group-sm">

            <div class="list-group-item">

              <input  type="text" placeholder="phone" class="form-control no-border" ng-model="seller.phone" required>

            </div>

            <div class="list-group-item">

                  <input style="width: 150px;float: left;border: 1px solid #DDD;"

                      type="phone" placeholder="4位验证码" class="form-control no-border" ng-model="seller.verification" required>

                <button style="width: 150px;float: right;" type="button" class="btn  btn-primary btn-block" ng-click="sendVerification()" ng-disabled='!seller.phone||send' >

                    {{countDown}}

                </button>

                <div class="clearfix"></div>

            </div>

            <div class="list-group-item">

               <input type="password" placeholder="Password" class="form-control no-border" ng-model="seller.password" required>

            </div>

          </div>

</form>

app.controller('SignupFormController', [ '$interval', '$scope', '$http', '$state', function( $interval, $scope, $http, $state) {

    $scope.countDown = "获取验证码";

    $scope.loginmsg="";

    $scope.send = false;

    $scope.sendVerification = function() {

        $http.post('http://localhost:8083/boronManager/seller/verification/' + $scope.seller.phone, {verificationType: 1}).then(function(response) {

            var req = response.data;

            if(!req.success)

                $scope.authError = req.error;

        }, function(x) {

            $scope.authError = response.data.error;

        });

        var cd = 60;

        var toDo = function() {

            $scope.send = true;

            cd--;

            if(cd < 0) {

                cd = "";

                $scope.send = false;

            }

            $scope.countDown = "重新获取 " + cd;

        };

        $interval(toDo, 1000, 60);

    };

}]);