The invention provides a method for improving the game fluency under a low-memory Android device.The low-memory Android device refers to the Android device of which the physical memory is not more than 256 MB.In the prior art, the low-memory Android device lags while running a big game, due to the fact that residual available memory is less, and most of the memory exits in a file system cache mode and can be allocated through memory reclamation, frequent memory reclamation can cause too high CPU occupancy rate, and system lagging is caused.The implementation method comprises the steps that a timer is started at an Android application layer, idle memory and file system cache sizes are obtained every five seconds, when a threshold value is reached, the file system cache is removed and turned into system idle cache capable of being directly allocated, and the system lagging phenomenon caused by cache reclamation is relieved.By mean of the method for improving the game fluency under the low-memory Android device, big games of Temple Run and the like can be run smoothly, and the product competitiveness is promoted.