A new method was developed to measure the neutron albedo by the Monte Carlo code and the activation method. The total neutron fluence at various places on the capture apparatus’ surface was measured by the activation method

and the fluence ratios of incident to reflected neutrons at these places were calculated by MCNP. The meas- urement results were modified by the calculation and an important parameter “neutron albedo” upon the capture ap- paratus was obtained. This parameter would provide a reference for the parameter’s measurement and practical appli- cation of thermal neutron radiography in the pulsed reactors.