The invention relates to a lottery machine preventing a lottery from being pulled out. A base is provided with a driving device, two rolling wheels and a braking device, wherein one rolling wheel is provided with a shaft extending out of the base to be sleeved and assembled with the braking device, the braking device is sequentially provided with a rotary wheel, a shaft sleeve, a braking wheel, aspring, a sleeve lid, a buckling piece and an external lid, a clamping hole is arranged on the rotary wheel, the braking wheel is provided with a shaft sleeve hole in the same shape as the shaft sleeve and sleeved on the shaft sleeve, a plurality of clamping holes are arranged on the braking wheel and provided with many latches, and convex posts are arranged on the back of the braking wheel and can be clamped into the clamping holes of the rotary wheel. The external lid covers the braking device, a plurality of latches are arranged in the external lid to be correspondingly clamped with the latches of the braking wheel, and both ends of the spring are respectively pressed against the braking wheel and the internal side wall of the sleeve lid. If the lottery is pulled out by a strong force,the braking wheel is sleeved on the assembling part of the shaft by the shaft sleeve and is driven to rotate out of and separate from the rotary wheel, and the latches of the breaking wheel and the latches of the external lid are clamped and fixed, so the rolling wheel cannot rotate at all, and the lottery is tightly pressed and prevented from being pulled out.