Method and device for transmitting power through DP port, computer equipment and storage medium

The invention relates to a method and device for transmitting electric power through a DP port, computer equipment and a storage medium, and the method comprises the steps: carrying out the voltage conversion of a system power supply, and providing a 3.3 V and 500 ma power supply as an initial state when Source detects that Pin18 is low; when the Source detects that the output power of the Pin20 is greater than 200ma, and the Pin18 has a hot plug signal and has 3.3 V, detecting the communication state of the Pin15 and the Pin17; the method comprises the following steps: acquiring a Sink basic attribute from a communication channel consisting of Pin15 and Pin17; and respectively combining the Pin20 and the Pin19 as well as the Pin14 and the Pin13 into two groups of power supply units, and cutting off the power supplies of the Pin13 and the Pin14 when detecting that the output is greater than the communication power of the communication protocol. An independent external power supply device is omitted for the di