A hot updating method of script file package and a hot updating device of script file package are provided, which belongs to the technical field of hot updating. The hot updating method of script file package includes: receiving an update request of a terminal for an application program, where the update request carries a terminal identification; acquiring an initial script file packet of the application program, extracting an encryption feature vector of the initial script file packet, encrypting the initial script file packet according to the encryption feature vector, and generating an encrypted script file packet; calculating a first MD5 value of the encrypted script file packet; calculating an encrypted feature value of a combination of the terminal identification and the feature vector; and generating a hot update package, according to the encrypted script file package, the first MD5 value and the encrypted feature value, and sending the hot update package to the terminal.