The invention discloses a Unikernel-based cloud Android operating environment construction method, and belongs to the technical field of cloud computing virtualization. The method comprises the stepsthat firstly, an Android subsystem assembly which must be supported for achieving the minimum Android operating environment cloud under the Android code unloading scene is analyzed and obtained at first; then, an Android essential subsystem and a Bionic and Dalvik virtual machine are transplanted into a library operating system; then, an Android application code is compiled, and a related dependence package is extracted from the library operating system for generating a Unikernel virtual machine mirror image; finally, the Unikerel is started on a KVM, an XEN and other Hypervisor, and the Android code is operated. The essential Android environment support is added to the library operating system, the Android application code is compiled to the Unikernel, the characteristics that the Unikernel mirror image is large in size, low in cost, rapid in starting, high in isolation performance and the like are utilized, the cloud resource cost can be effectively lowered, the number of virtual machine instances provided by the cloud is increased, meanwhile, the delay of cloud and terminal communication is greatly lowered, and the user experience of terminal applications is improved.