The invention discloses a multi-soaking condition simulation test model box and a test method thereof. The multi-soaking condition simulation model box comprises a lidless cavity composed of a section steel frame and side plates, the bottom of the cavity is provided with a baseboard having soaking holes, a water storage box is formed between the baseboard and the cavity, a middle isolation plate is arranged in the water storage box, the sidewall of the water storage box is provided with a plurality of soaking holes, a baffle plate which forms a water storage tank together with the sidewall of the cavity is arranged outside the bottom of the cavity, the top of the cavity is provided with a support, the support is provided with a length-adjustable soaking tube, and the top of the cavity is provided with a plurality of detachable reaction beams and a jack. The multi-soaking condition simulation test model box has the advantages of clear structure, complete functions, strong repeated usage, realization of multiple groups of test of different soaking condition requirements, and good application prospect.