Traditional soil solution sampling often involves on-site collection of soil samples and analysis using immersion solution method, which is labor-intensive and cannot accurately pinpoint the dynamic changes of solutes. This instrument is a fixed-point continuous collection instrument for soil solution, consisting of a water head, a sampling bottle, and a water pump (as shown in Figure 1). Due to the fact that the water intake head can pass through multiple solutes, when the water intake head is buried in the soil, it can be located and timed to extract soil water/solution to monitor the changes in soil solutes. This method has been widely promoted in fields such as soil fertilizer research, soil pollution, water conservancy departments, and environmental monitoring.