The invention discloses a high-speed asynchronous serial data transmission method applied to an array type ground penetrating radar, and belongs to the technical field of inter-board digital signal high-speed asynchronous serial transmission of an array type ground penetrating radar system. According to the invention, the problems of low data transmission rate and poor accuracy between the acquisition board and the main control board caused by code element serial bit in the existing high-speed asynchronous serial transmission method are solved. The bit synchronization of digital communicationcan be realized only by adopting a sampling clock which is five times of the code element transmission rate, so that the problem that the code element is easy to misplace in the existing method can beovercome, and the accuracy of data transmission is improved; moreover, under the condition that a channel-associated clock does not exist, the method can effectively save transmission channels, and in an array type ground penetrating radar system, the transmission rate larger than 80 Msps can be achieved through the method. The method can be applied to the technical field of inter-board digital signal high-speed asynchronous serial transmission of an array type ground penetrating radar system.