Four-way reversing valve and air conditioner

The invention provides a four-way reversing valve and an air conditioner. The four-way reversing valve comprises a valve body and a sliding block. The valve body is provided with a first side and a second side, the first side is provided with an inlet, and the second side is sequentially provided with a first outlet, a second outlet and a third outlet at intervals in the first direction; the sliding block can be arranged in the valve cavity in a sliding mode in the first direction and is provided with a third side corresponding to the first side and a fourth side corresponding to the second side, the third side is provided with two flow guide plates arranged in the first direction in a spaced mode, the flow guide plates are provided with flow guide openings communicated with the valve cavity, and the two flow guide openings are opposite in direction and are opposite to each other. A conduction groove is formed in the fourth side; the sliding block can be adjusted between a first position and a second position