Blockchain uploading method for preventing data tampering

The invention discloses a data tampering prevention blockchain uplink method, and the method comprises the following steps that S1, an uplink hardware system and a blockchain node carry out identity mutual verification, and initialized identity authentication is completed; S2, the uplink hardware system obtains the key data from the service equipment through the data acquisition hardware interface, and performs identity signature and encryption on the key data; S3, the uplink hardware system obtains the associated data from the communication device through the near field communication module, and performs identity signature and encryption on the associated data; S4, the uplink hardware system packages the key data and the associated data, performs identity signature and encryption on the packaged data, and sends the packaged data to the block chain node to complete data uplink. According to the method disclosed by the invention, the key data is ensured to pass through the verification and protection mechanism