您遇到什么错误？好像您错过了TableName的缩进，请尝试以下方法：

Policies:
 - DynamoDBCrudPolicy: 
     TableName: table1
 - DynamoDBCrudPolicy: 
     TableName: table2

PS：我可以将其写到注释中，但是代码格式不正确

我要做的是像这样为lambda函数创建一个角色：

Resources:
  MyFunction:
    Type: AWS::Serverless::Function
    Properties:
      CodeUri: path/to/something
      Handler: index.handler
      Runtime: nodejs10.x
      Events:
        Get:
          Type: Api
          Properties:
            RestApiId: !Ref MyApi
            Path: /path/to/other/thing
            Method: post
      Role: !GetAtt MyDynamoDBRole.Arn

然后将策略附加到该角色。像这样：

  MyDynamoDBRole:    
    Type: AWS::IAM::Role
    Properties:
      Path: "/"
      Policies:
        -
          PolicyName: "myDynamoDBPolicy"
          PolicyDocument:
            Version: "2012-10-17"
            Statement:
              -
                Effect: "Allow"
                Action:
                  - "dynamodb:BatchGetItem"
                  - "dynamodb:BatchWriteItem"
                  - "dynamodb:PutItem"
                  - "dynamodb:GetItem"
                  - "dynamodb:Scan"
                  - "dynamodb:Query"
                  - "dynamodb:UpdateItem"
                  - "dynamodb:UpdateTable"
                  - "dynamodb:GetRecords"
                Resource: "arn:aws:dynamodb:us-east-1:123456789012:table/table1"
      AssumeRolePolicyDocument:
          Version: '2012-10-17'
          Statement:
          -
            Effect: Allow
            Principal:
              Service:
              - dynamodb.amazonaws.com
            Action: sts:AssumeRole

请注意：，您可能需要调整特定权限以适合您的用例，上面的代码仅是一个示例，用于说明我建议的结构。