With the increasing complexity and diversity of transportation environments and tasks, heavy-duty unmanned aerial vehicle (UAV) systems have become increasingly crucial across various application scenarios, necessitating greater attention to their safety. Given the substantial weight of power supplies and materials, the loss of control during suspension operations by multi-rotor UAVs can swiftly lead to crashes from heights in various orientations, posing severe threats to the UAV system. To address this, we have devised a novel multi-UAV collaborative anti-crash system for heavy-duty UAVs. This system integrates dual-UAV collaborative suspension with an automated load release mechanism, significantly enhancing the safety and efficiency of heavy-duty operations. Our research not only offers a novel technical solution for safe UAV operations but also provides theoretical foundations and practical guidance for the design and implementation of future heavy-duty UAV systems. Through further promotion and application, this system holds great potential to play a pivotal role in multiple sectors, including logistics, construction, and rescue, thereby driving the widespread adoption and advancement of UAV technology.