Semiconductor detectors based on a silicon pin diode are frequently used in the detection of different nuclear radiations.For the detection and dosimetry of fast neutrons,these silicon detectors are coupled with a fast neutron converter.Incident neutrons interact with the converter and produce charged particles that can deposit their energy in the detectors and produce a signal In this study,three methods are introduced for fast neutron dosimetry by using the silicon detectors,which are:recoil proton spectroscopy,similarity of detector response function with conversion function,and a discriminator layer.Monte Carlo simulation is used to calculate the response of dosimetry systems based on these methods.In the different doses of an 241Am-Be neutron source,dosimetry responses are evaluated.The error values of measured data for dosimetry by these methods are in the range of 15-25％.We find fairly good agreement in the 241Am-Be neutron sources.