可以使用以下CSS样式来避免滚动：

.ant-modal-wrap {
  position: fixed;
}

.ant-modal-content {
  overflow: auto;
  max-height: 90vh;
}

代码示例：

import React from 'react';
import { Button, Modal } from 'antd';
import './index.less';

const ModalContent = () => {
  const [visible, setVisible] = React.useState(false);

  const showModal = () => {
    setVisible(true);
  };

  const hideModal = () => {
    setVisible(false);
  };

  return (
    <>
      
        Open Modal
      
      
            Cancel
          ,
          
            Ok
          ,
        ]}
        wrapClassName="ant-modal-wrap"
        bodyStyle={{ padding: '24px' }}
      >
        

          
Some contents...
          
Some contents...
          
Some contents...
          
Some contents...
          
Some contents...
          
Some contents...
          
Some contents...
          
Some contents...
          
Some contents...
          
Some contents...
          
Some contents...
        
      
    
  );
};

export default ModalContent;