The invention discloses LIV effect adjustable lanthanum-calcium-manganese-oxygen thin film preparation equipment. The LIV effect adjustable lanthanum-calcium-manganese-oxygen thin film preparation equipment comprises a cabinet body, a laser generator, a vacuum system, an atmosphere system, a target material system, a thin film system, a shoot plating system, a magnetic control system, a film thickness testing system and an LIV performance adjusting system. According to the LIV effect adjustable lanthanum-calcium-manganese-oxygen thin film preparation equipment, the controllability of the thinfilm quality can be greatly improved, thus the film thickness is controllable, and a large-area application-type thin film can be prepared by enlarging the magnetic field range; preparation of the multi-component thin film can be conducted by switching materials in real time, it is ensured that preparation conditions are the same, and the thin film of different states can be prepared under same adjustment; and a real-time testing function is achieved, the film thickness of the thin film and the LIV effect performance can be monitored in real time, the technological adjusting period can be greatly shortened, the work procedure conditions can be adjusted in time to prepare samples meeting the requirement, the raw material utilization rate is increased, and the development cost is reduced.