Multifunctional soil pollution detection device

The utility model provides a multifunctional soil pollution detection device. The multifunctional soil pollution detection device comprises a protection box, wherein the inner side of the protection box is connected with a lifting driving mechanism; the output end of the lifting driving mechanism faces downwards and is fixedly connected with a drill bit, a cavity is formed in the inner side of the drill bit, a detection mechanism and a protection mechanism are connected to the inner side of the cavity, the detection mechanism is connected with the protection mechanism, and a detection opening communicated with the cavity is formed in the side end of the drill bit; the protection mechanism comprises a second servo motor, a gear, a detection sliding block and a sealing sliding block, the second servo motor is fixedly connected to the inner side of the cavity, the protection mechanism comprising the second servo motor, the gear, the detection sliding block and the sealing sliding block is installed on the inner