Writing and pen holding standardizing device

The invention relates to the technical field of writing and pen holding standardizing devices, and discloses a writing and pen holding standardizing device which is integrally formed and comprises a penholder sleeve, a thumb sleeve, an index finger sleeve, a penholder leaning groove and a middle finger supporting groove, the penholder sleeve is about 3cm long, is sleeved on penholders of pencils, fountain pens and the like, is about 2-3cm away from a pen point, and ensures that pen holding acting points of three fingers form a triangle; the thumb and the index finger define an ellipse, the index finger protecting piece arranged on the index finger sleeve can fit the shape of the index finger, and meanwhile, the penholder leaning groove is located at the root of the index finger, so that the included angle between the penholder sleeve and the index finger sleeve enables the penholder not to fall at the jaw of the finger, and the penholder leans against the root of the index finger. The standardizing device com