A method for testing anti-cracking performance of concrete comprises the following steps: stirring raw materials of the concrete according to a ratio, pouring the concrete in a template, and maintaining the upper surface of a test specimen exposed to simulate temperature and humidity influence caused by environment factors; inserting temperature sensors in trisection points of the middle part of the test specimen separately and in a temperature measuring hole of an environment box, and placing a humidity sensor in the environment box; mounting a displacement sensor in the middle of the test specimen and fixing the displacement sensor with a positioning tool to maintain the position of the displacement sensor to be constant; setting the corresponding environment box temperature, humidity and constrained parameters in a software testing interface, simulating a real environment, disassembling the positioning tool after final setting of the concrete, beginning to test, applying pressure tothe concrete every five hours, and measuring displacement data of the concrete; and calculating elasticity modulus of the concrete at different ages according to a formula, and calculating indexes ofthe anti-cracking performance of the concrete according to the formula. The anti-cracking performance under the temperature change and development condition of the concrete can be tested, and a reliable basis is provided for mastering mechanical properties of the concrete and prevention of cracks of the concrete.