The invention relates to a well-drilling early overflow loss ground monitoring device. The well-drilling early overflow loss ground monitoring device comprises a data acquiring device, a data processor and a drill floor displayer connected with the data processor, wherein the data acquiring device is respectively connected with inlet and outlet flow sensors, a bit pressure sensor, a drill disc rotating speed sensor, a drill disc torque sensor, a mud pit liquid level sensor, a sleeve pressure sensor and a vertical pipe pressure sensor and is connected with the drill floor displayer through the data processor. The well-drilling early overflow loss ground monitoring device adopts a structure mode recognition method, automatically adjusts sensitivity, recognizes the type of well kick media, adopts pictorial chart outputting, achieves intelligentized monitoring, is high in monitoring accuracy, greatly shortens time for finding well kick, facilitates timely adoption of a well control measure, avoids safety accidents, is suitable for various well drilling working conditions, makes up the limitations of traditional monitoring methods, is simple in system structure, simple and convenient to maintain, low in monitoring cost and wide in application range and facilitates large-scale popularization.