The invention discloses a simple mounting and dismounting device for a bucket tooth pin of an excavator. The simple mounting and dismounting device comprises a thickened main board block, a handle, a pin dismounting bar, a pin mounting bar and a pin ejecting bar, wherein a handle screw hole is formed in the upper end of the thickened main board block, and the handle is mounted at the handle screw hole; a pin dismounting bar screw hole is formed in the lower end of the thickened main board block, and the pin mounting bar or the pin dismounting bar is mounted at the pin dismounting bar screw hole respectively based on requirements for mounting and dismounting functions. The pin dismounting bar is mounted at the pin dismounting bar screw hole, the handle is held by a hand to align the pin dismounting bar with the bucket tooth pin in a bucket tooth, and the thickened main board block is beaten by a hammer, accordingly, the bucket tooth pin can be easily dismounted. The pin mounting bar is mounted at the pin dismounting bar screw hole, one end of the bucket tooth pin is inserted into a pin sleeving hole, the other end of the bucket tooth pin is aligned with a bucket tooth pin hole, the thickened main board block is beaten by the hammer to contact the pin sleeving hole with the bucket tooth, the simple mounting and dismounting device for the bucket tooth pin of the excavator is taken up, the pin ejecting bar is inserted into the pin sleeving hole, an ejecting head of the pin ejecting bar is aligned with the exposed bucket tooth pin, and then the thickened main board block is beaten by the hammer, hence, the bucket tooth pin is completely mounted. The simple mounting and dismounting device is simple and practical, and is a necessary tool for a user of the excavator.