Cultivated land quality monitoring system

The invention relates to a cultivated land quality monitoring system. The cultivated land quality monitoring system comprises an insertion rod and a monitor, a driving mechanism is connected to the interior of the monitor, a protection block is connected to the output end of the driving mechanism, a monitoring sensor is connected to the interior of the monitor, the monitoring sensor comprises a probe, and the probe is located in the protection block. An outlet hole is formed in the outer surface of the monitor, the driving mechanism drives the protection block to retract into the monitor after driving the protection block and the probe to extend out of the position of the outlet hole by a limit distance, and the probe is left outside the monitor; the cultivated land quality monitoring system is simple in structure, convenient to operate, flexible to use, ingenious in design and convenient to popularize and use in the industry, the probe can be protected conveniently through a sliding block, the probe can retr