The invention discloses a locomotive signal collecting and fault handling device which comprises a signal collector, a filter shaping module, a depressurizing isolation module, a forwards-arranged machine server, a PLC and a handling device body. The signal collector is connected with the forwards-arranged machine server through the filter shaping module and the depressurizing isolation module, and the PLC is connected with the forwards-arranged machine server. The PLC is in loop connection with the signal collector through the handling device body, a judgment module is further arranged in thePLC, and the judgment module is in loop connection with the signal collector through the handling device body. The signal collector internally comprises a speed signal collecting module, a dynamic electric energy signal collecting module, a load signal collecting module and a speech signal collecting module. Effective monitoring of the multi-aspect signal quality safety of a locomotive and timelyand effective handling of a fault are achieved, the application field is quite wide, system integration and integrated control are facilitated, and the actual using requirements are met.