给接收端添加：

channel.basic_qos(prefetch_count=1)  ##一次处理一个，处理完再接受新消息

发送端：

import pikaconnection = pika.BlockingConnection(pika.ConnectionParameters('localhost'))channel = connection.channel()channel.queue_declare(queue='hello',durable=True)  ##队列持久化，队列重启后也存在，不保证数据是否存在# channel.queue_delete(queue="task_queue")for i in range(100):    channel.basic_publish(exchange='',                          routing_key='hello',                          body=str(i),                          properties=pika.BasicProperties(delivery_mode=2) ##数据持久化                          )# print("Sent 'hello world!'")connection.close()

接收端：

#!/usr/bin/env pythonimport pikaimport timeconnection = pika.BlockingConnection(pika.ConnectionParameters(host='localhost'))channel = connection.channel()channel.queue_declare(queue='hello',durable=True)# channel.queue_bind(queue='hello',exchange='',routing_key='hello')def callback(ch, method, properties, body):    # print("aaa")    print(" [x] Received %r" % body)    time.sleep(1)    ch.basic_ack(delivery_tag=method.delivery_tag)  # 给rabbitmq返回已拿到数据信号。channel.basic_qos(prefetch_count=1)  ##一次处理一个，处理完再接受新消息channel.basic_consume(callback,                      queue='hello',                      no_ack=False)print(' [*] Waiting for messages. To exit press CTRL+C')channel.start_consuming()