The invention relates to an LTE system cell searching method, and belongs to the technical field of communication tests. In the method, a slipping correlation algorithm is firstly used for acquiring aCP type and a position thereof, then PSS and SSS signals can be synchronously acquired according to the positions of the PSS and SSS in a frame structure, the situation that each slipping correlationneeds to be correlated to three sets of local signals when PSS detection is performed, the CP type and the PSS and SSS signals can be acquired by using the slipping correlation just once, and the computing amount is greatly reduced while the cell searching accuracy is ensued. According to the method provided by the invention, the problem that in the LTE-A system, the cell searching process is tedious and the computing amount is large is solved, and thus the purpose of quickly and accurately searching the cell is achieved.