The invention relates to a device and method for editing mass texting messages based on a mobile terminal address book. The device comprises a message editing module, a contact information editing module, an address book storage module, a key work list storage module and a message sending module, wherein the message editing module is used for editing the mass texting messages, and the key work list storage module is used for storing key word lists specified by users. The method comprises the following steps of: opening the address book and selecting contacts to which the messages are to be massively sent; editing the content of the mass texting messages by the users and adding selected key words to the content of the mass texting messages edited by the users; replacing the key words in the content of the mass texting messages by the selected contact information; and previewing, affirming and sending the messages. When the device and the method of the invention are utilized for massively texting messages, the key words in the message content can be automatically customized according to contact information including family names, names, genders, nicknames, positions, birthdays and the like, so the message content is more humanized and more friendly, and meanwhile, a large amount of time can be also saved for the users.