The invention provides an anti-overturning paper cup. A support component is arranged at the outer side of a ringlike cup foot. The end of the support component is connected to the ringlike cup foot.When the anti-overturning paper cup is used, the support component is unfolded around the connection position of the support component and the ringlike cup foot toward the outer side of the ringlike cup foot. The lower edge of the support component is not lower than the lower edge of the ringlike cup foot. The support component is a closed ringlike component. The closed ringlike component is composed of four or more paper strips. The paper strips are in end-to-end connection and are connected with the ringlike cup foot. When the anti-overturning paper cup is used, the closed ringlike componentis unfolded along the connection positions of all the paper strips. According to the anti-overturning paper cup, the support component is arranged at the outer side of the ringlike cup foot of the paper cup, when a user adds water into the paper cup or touches the paper cup by accident, the support component can play a support role, and the paper cup cannot be overturned. When the anti-overturning paper cup is used, the paper cup cannot be overturned; and when the paper cup is used for containing hot drink, the problem that the user is scalded by the hot drink due to the fact that the paper cup is overturned can be avoided.