Wash your hands.
Sweaty hands don't dry up on their own, so you'll have to wash them more often than most people do in order to keep them dry. Wash them when the amount of sweat starts to bother you, then thoroughly dry them off with a towel or washcloth.
When you aren't washing up for dinner or after using the bathroom, it's fine to use plain water, rather than soapy water, to wash your hands. This way you'll avoid drying out the skin on the back side of your hands from using too much soap.
Carry alcohol-based hand sanitizer (not antibacterial) for the times when you can't get to a sink to wash your hands. A squirt of alcohol works to temporarily dry up the sweat.
Carry a cloth or a package of paper towels so you can wipe off your hands when you need to. Use them before situations when you'll be shaking hands with someone.
Cool off your hands. Many people get sweaty hands when their bodies are slightly overheated, so cooling them off can be a quick and effective remedy. Hold your hands in front of a fan or air conditioner to dry the moisture and slow down the production of sweat.
To cool your hands down quickly when you aren't at home, find a bathroom and run them under cold water, then dry them thoroughly with a paper towel.
Avoid getting too hot in the first place, if possible. Don't use a heater unless it's absolutely necessary, and turn down the thermostat in your room.
Sprinkle some powder on your hands. If you're at home and don't mind your hands looking a little white, sprinkle them with a powder to temporarily absorb the sweat. This can come in handy if your sweaty hands inhibit daily activities like lifting weights, jumping rope or completely chores that require a tight grip.
Try the following types of powder:
Baby powder, either scented or unscented.
Baking soda or corn starch.
wikihow