Kit, micro-fluidic chip device and use method of micro-fluidic chip device

The invention relates to a kit, a micro-fluidic chip device and a using method thereof. The kit comprises a confluence assembly, a confluence channel is formed in the confluence assembly, a first fluid connecting hole is formed in the confluence assembly, and the confluence channel and the first fluid connecting hole are used for being communicated with a micro-fluidic chip; the positioning assembly is arranged on the confluence assembly, the positioning assembly is located on the side, where the first fluid connecting hole is located, of the confluence assembly, and a limiting groove matched with the micro-fluidic chip is formed between the positioning assembly and the confluence assembly; and the cover plate assembly is arranged on the confluence assembly, and the positioning assembly is located between the cover plate assembly and the confluence assembly. According to the kit applied to the micro-fluidic chip, the structure enables a pipeline connection structure between the micro-fluidic chip and external