The utility model relates to the technical field of vehicle assembling, in particular to a mould conversion platform. The mould conversion platform comprises a main support. A supporting platform face is arranged on the top portion of the main support, a rotary shaft is arranged at the central position of the bottom portion of the main support, and at least two idler wheels are arranged on the bottom portion of the main support around the circumferential direction of the rotary shaft. Therefore, quick conversion during mould exchanging is completely realized. Moreover, the mould conversion platform is simple and convenient to use, low inmanufacturing cost and capable of greatly improving production efficiency and reducing labor intensity.