Distributed intelligent platform management bus connection method and atca frame

A distributed intelligent platform management bus (IPMB) connection method and ATCA frame. The ATCA frame having a plurality of slots is provided with ATCA boards inserted into the slots. Each ATCA board comprises two main control boards and at least one node board, each node board being provided with an IPMC thereon; a BMC is integrated on the two main control boards respectively, and an IPMI is disposed on each main control board; the BMC on each main control board is in a point-to-point star connection with the IPMC on each node board and the IPMI on the other main control board; the BMC exchanges data with the IPMC node of a peripheral board via the IPMI; the BMC exchanges data with the IPMI via the local bus, and the IPMI exchanges data with each IPMC node of the peripheral board via independently distributed I2C-based multipath IPMB buses, the total number of the I2C-based multipath IPMB buses provided by the IPMI corresponding to the number of the peripheral boards.