The invention discloses a method of improving a Bluetooth BLE (Bluetooth Low Energy) transmission speed on an IOS terminal device. The method comprises the following steps: (1) N BLE unit modules are arranged in a Bluetooth peripheral device, a main processor is respectively connected with each BLE unit, and the IOS terminal device and each BLE unit are subjected to pairing connection; (2) in the IOS terminal device, data in need of transmission are divided into N data blocks, each data block is transmitted to the Bluetooth peripheral device via a corresponding BLE unit, each data block carries out cross loop transmission, after partial data of the data block 1 are transmitted for one time, partial data of the data block 2 are transmitted at an 20/N ms interval... partial data of the data block N are transmitted at an 20/N ms interval, partial data of the data block 1 are transmitted at an 20/N ms interval, such polling is carried out until all data blocks complete transmission; and (3) after the Bluetooth peripheral device receives each data block, the main processor merges the data blocks to restore the original data. The Bluetooth transmission speed and the transmission amount can be improved.