Micro-fluidic chip with rotary valve and control method thereof

The invention provides a micro-fluidic chip with a rotary valve and a control method thereof, and the micro-fluidic chip comprises a chip body, the chip body is provided with an accommodating blind hole, at least two liquid storage tanks and communication channels communicated with the liquid storage tanks in a one-to-one correspondence manner, the first end of each communication channel is communicated with the liquid storage tanks, and the second end of each communication channel is communicated with the accommodating blind hole; the rotary valve is contained in the containing blind hole, the axial section of the rotary valve and the axial section of the containing blind hole are both isosceles trapezoids, the outer side wall of the rotary valve is matched and attached to the inner side wall of the containing blind hole, the long bottom edge of each isosceles trapezoid is located on the outer side of the containing blind hole, and a sample outlet is formed in the outer side wall of the rotary valve. The sam