The paper aims to study the method for evaluating the strength of a railway cargo loading and reinforcement device (CLRD). Static and impact strength tests were carried out on a reinforced frame to measure the stress on the dangerous section of a reinforced frame during static and dynamic impact. The maximum force acting on the device was calculated according to the relevant provisions of the "Rules for Railway Cargo Loading and Reinforcement"; and the strength of the device under the force was evaluated with the finite element method. At the same time, the stress obtained by static and shock dynamic tests and the stress by theoretical calculation were compared. The error between the tested value and the theoretical calculation result was about 10%. The value obtained from theoretical calculation had high precision. In the absence of test conditions, the simulation can be used to evaluate the strength of the CLRD.