The invention provides an Android platform malware automatic detecting method. The Android platform malware automatic detecting method comprises the steps of S1, setting a sensitive API dataset of an Android platform; S2, performing reversed code restoring on an application program to be tested to obtain the reversed code of the application program; S3, extracting the sensitive API and character string containing network address information in the reversed code according to the sensitive API dataset; S4, drawing a function call relation digraph according to the reversed code and judging whether the application program is malware or not according to the function call relation digraph and the extracted sensitive API and the character string. The Android platform malware automatic detecting method can automatically judge whether the application program is the malware or not, and the detection efficiency of the malware under the Android platform is improved.