The invention discloses a remote task function calling method oriented at a multi-core processor. A memory space which is named as 'mailbox' and can allow other cores to get access for reading data is distributed for each core, each core can conduct read operation and write operation in the 'mailbox' spaces of the corresponding core and other cores, and competitive read-write access of the 'mailbox' spaces is avoided through resource mutual exclusion locks. When a message is written into the target 'mailbox' space, the remote procedure calling initiating core can inform the target core of arrival of the new message in an inter-initiating-core interruption mode, the target core transfers into intercore interruption processing functions to parse the function calling index value in the message, the specific local functions are called according to function parameters and relevant information, and the remote calling process of the functions is completed. In this way, by means of the method, the real-time and high-efficiency requirements of remote function calling of a real-time operating system can be met, and the complexity problem caused in the previous remote function calling process is solved.