中联重科ZTC201E551起重机的优点有：1. 高承载能力：该起重机具有较高的起重能力，能够满足大多数起重工作的需求。2. 灵活性强：该起重机具备灵活的工作半径和360度无死角的回转能力，适应各种复杂工况。3. 操作简便：该起重机配备电子控制系统，操作简单方便，提高工作效率。4. 稳定性高：该起重机配备稳定器可以提供良好的平衡和稳定性，确保起重过程安全可靠。5. 可靠性强：该起重机采用先进的设计和制造技术，具有较高的可靠性和耐久性，减少故障和维修时间。6. 维护成本低：该起重机配备自动润滑系统，减少了维护和保养成本。7. 安全性高：该起重机采用多重安全保护装置，确保工作过程中人员和设备安全。

Advantages of Zoomlion ZTC201E551 crane include:1. High load capacity: the crane has high lifting capacity, which can meet the needs of most lifting work.2. Flexible: the crane has flexible working radius and 360-degree dead-angle-free slewing ability, adapting to various complex working conditions.3. Easy operation: the crane is equipped with electronic control system, which is easy and convenient to operate, improving work efficiency. High stability: the crane is equipped with stabilizers that can provide good balance and stability to ensure safe and reliable lifting process.5. Reliability: the crane adopts advanced design and manufacturing technology, which has high reliability and durability and reduces the breakdown and maintenance time.6. Low maintenance cost: the crane is equipped with an automatic lubrication system, which reduces the cost of maintenance and upkeep.7. High safety: the crane adopts multiple safety protection devices to ensure the safety of personnel and equipment during the working process.