The invention discloses a method, a device and equipment for detecting lead code of random access channel, which are used for reducing the complexity of lead code detection. The method for detecting lead code of random access channel comprises: carrying out multiplication operation equivalent to time domain correlation operation on a lead code to be detected which is acquired from the received signals and any sequence selected as the lead code in the frequency domain to obtain a group of correlation values; confirming the module value of each correlation value and arranging all the module values in a descending order, and extracting the module values with the identical number which are arranged forward according to the numbers of all the sequences which can be selected as the lead code; confirming the judgment variable corresponding to each extracted module value according to all the module values, and detecting that the sequence corresponding to the extracted module value is selectedas the lead code when the judgment variable corresponding to the extracted module value is larger than or equal to the confirmed judgment threshold.