The invention mainly relates to the technical field of landslide monitoring. The invention discloses a projection type landslide monitoring device. The device mainly comprises a nose cone, a reducingcoupling cavity, a load cabin and empennages, wherein the top end of the nose cone is of a conical structure, the bottom end is coupled with a reducing port of the reducing coupling cavity, the inneris hollow, the load cabin is arranged at the other end of the reducing coupling cavity, the empennages are arranged on the left and right sides of the load cabin respectively, an infrasound sensor, adata acquisition module, a communication module and a lithium battery are arranged in the load cabin, the lithium battery is used for supplying power, the infrasound sensor monitors the sound wave, the data acquisition module acquires infrasonic wave signals, the acquired infrasonic wave signals are transmitted to the central server through the communication module. The unmanned aerial vehicle isused for carrying the projection type landslide monitoring device, so that an operator can work far away from a geological disaster site, the safety problem of the operator is solved, meanwhile, the projection type landslide monitoring device can be deployed in a short time, and the timeliness of geological disaster monitoring is improved.